{"content_id":"yqlbkoacex","slug":"covid19-vaccination-2026-flu-coadministration-error-prevention","locale":"en","schema_type":"Article","category":"knowledge_base","category_name":"Knowledge Base","title":"COVID-19 Vaccination 2026: Flu Coadministration and Errors","summary":"Coadministration of COVID-19 and flu vaccines is recommended, but it must be distinguished from unnecessary duplicate vaccination. For the 2026~2027 season, the points to check are eligibility and schedules, vaccination history, same-day registration, and the response to vaccination errors.","sponsorship_disclosure":null,"affiliate_disclosure":null,"commerce_disclosure":null,"author":{"name":"Injoys Editorial Team","url":"https://injoys.com/ko/about"},"key_points":["COVID-19 and influenza vaccines can be administered at the same time at different injection sites.","National COVID-19 vaccination for the 2026~2027 season is for people aged 65 and older, immunocompromised people, and inpatients and residents of facilities vulnerable to infection.","Vaccination schedules for high-risk children under 12 will be announced separately as vaccines are introduced.","Medical institutions must check vaccination history before vaccination and record the vaccination in the system on the day it is administered.","Vaccination errors must be reported to the public health center, and the affected person must be informed. Whether to revaccinate depends on the type of error."],"content_markdown":"Receiving COVID-19 and flu vaccines at the same visit is recommended. This differs from unnecessary duplicate vaccination, which means receiving the same vaccine again without a need. Healthcare providers must check vaccination histories before administering vaccines. After vaccination, they must register the records that same day.\n\nEligibility and schedules are based on the Korea Disease Control and Prevention Agency's program guidance dated October 19, 2026.\n\n## The difference between flu coadministration and duplicate vaccination\n\nCoadministration means receiving vaccines that prevent different infectious diseases on the same day. The official name for flu is influenza. The Korea Disease Control and Prevention Agency recommends coadministration of COVID-19 and influenza vaccines. They must be given at different injection sites.\n\n| Category | Meaning | What to check |\n| --- | --- | --- |\n| COVID-19 and flu coadministration | Receiving different vaccines on the same day | Check the vaccination requirements for each vaccine and administer them at different sites |\n| Unnecessary duplicate vaccination | Receiving another dose after completing the required vaccinations | Check previous vaccination dates, vaccines received, and whether vaccination for this season has been completed |\n| Additional vaccination according to guidelines | Giving additional doses required for specific groups | Check immune status and the applicable vaccination schedule |\n\nA second dose alone does not establish that a vaccination error has occurred. Separate dose requirements apply to immunocompromised people. The recommendation for coadministration also does not mean that individual contraindication checks can be skipped. The source is the Korea Disease Control and Prevention Agency's [COVID-19 National Immunization Program Guidelines](https://cert.kdca.go.kr/irhp/covd/goCov19Vcnt.do?menuCd=47\u0026menuLv=4).\n\n## Eligibility and vaccination schedules for the 2026~2027 season\n\nPeople aged 65 or older and designated high-risk groups are eligible for government-funded vaccination. This season, COVID-19 vaccination was designated an essential immunization. This change does not mean that vaccination is free for all ages.\n\n| Eligible group | Birth date or age criteria | Start date | End date |\n| --- | --- | --- | --- |\n| People aged 70 or older | Born on or before December 31, 1956 | October 12, 2026 | June 30, 2027 |\n| People aged 65~69 | Born from January 1, 1957, through December 31, 1961 | October 15, 2026 | June 30, 2027 |\n| Immunocompromised people, inpatients and residents of facilities vulnerable to infection | Aged at least 12 at the time of vaccination | October 12, 2026 | June 30, 2027 |\n| Immunocompromised people under 12, inpatients and residents under 12 of facilities vulnerable to infection | Detailed eligibility recommendations must be checked | Separate announcement after vaccines become available | Separate schedule must be checked |\n\nThis table shows the COVID-19 vaccination schedule. It must not be treated as the full schedule for the flu vaccination program. High-risk groups under 12 must be distinguished from the schedule above for those aged 12 or older. Being eligible and the actual start of vaccination are separate matters.\n\nThe vaccines covered this season are Pfizer's and Moderna's XFG vaccines. The standard schedule is 1 dose per year. Immunocompromised people receive 2 doses per year. Hematopoietic stem cell transplant patients require a clinical assessment under separate criteria.\n\nImmunocompromised status is not determined solely by a disease name. Treatment details and age-specific criteria are checked together. Facilities vulnerable to infection must also fall within the categories specified in the guidelines. The detailed source is the Korea Disease Control and Prevention Agency's [Implementation Plan for the 2026~2027 Season](https://www.kdca.go.kr/bbs/kdca/42/309792/download.do).\n\n## Findings from the October request to prevent vaccination errors\n\nThe recent request for cooperation focused on checks before vaccination and same-day registration. The Korean Hospital Association posted the request on October 19, 2026. The supporting document is an official notice from the Korea Disease Control and Prevention Agency dated October 16, 2026.\n\nThe Korean Hospital Association's “Request for Cooperation Regarding the Influenza and COVID-19 National Immunization Programs” requested the following checks and actions.\n\n\u003e Checking vaccine expiration dates and condition, and registering vaccination details in the system on the day of vaccination, among other measures\n\nThe numbers of reported vaccination errors listed in the posting are below. These figures reflect reports received as of the request for cooperation. They must not be read as cumulative totals through October 27, 2026.\n\n| Vaccine | Reports for the 2026~2027 season | Previous season's reports listed in the posting |\n| --- | --- | --- |\n| Influenza | 57 | 5 |\n| COVID-19 | 8 | 5 |\n\nReport counts alone cannot be used to calculate an individual's risk of a vaccination error. The posting does not include the total number of vaccinations needed to calculate an incidence rate. The text also does not specify the exact periods being compared. The figures come from the [Korean Hospital Association's request for cooperation](https://shop.kha.or.kr/kha_home/notice_list.do?article.offset=0\u0026articleLimit=10\u0026articleNo=47651\u0026mode=view).\n\n## Checks before and after vaccination\n\nPreventing vaccination errors extends from identifying the recipient to registering the vaccination afterward. Completing a pre-vaccination screening questionnaire is one step in this process. Completing the questionnaire alone does not mean that the vaccine and vaccination history have been checked.\n\n1. Verify the person's identity using at least two pieces of information, such as their name and date of birth.\n2. Look up previous vaccination records in the system.\n3. Check contraindications and precautions through the screening questionnaire and a medical examination.\n4. Cross-check the recipient and vaccine again immediately before administration.\n5. Check the vaccine's type, dose, expiration date, and condition.\n6. Register the vaccination in the system immediately afterward.\n7. Explain precautions and monitor for adverse events.\n\nThe 2026 National Immunization Guidelines also require similar vaccines to be stored separately. Refrigerator temperature and expiration date checks are part of routine management. These requirements apply alongside visual checks on the day of vaccination. The source is the [vaccination safety section of the 2026 National Immunization Guidelines](https://kdca.go.kr/bbs/kdca/55/307748/download.do).\n\n### Screening questionnaires and limits on vaccination numbers\n\nScreening questionnaires and limits on vaccination numbers are safeguards to prevent verification steps from being skipped. Whether vaccines are coadministered and how forms are managed must be understood separately. The latest screening questionnaire is available in the vaccination guidelines on Immunization Assistant.\n\nThe 2026 guidelines set a maximum of 100 people per day for each physician conducting pre-vaccination examinations. Influenza and COVID-19 vaccinations are counted separately. Because some categories, such as paid vaccinations, are excluded, this differs from the total number of visitors. Details on how the limit applies must be checked in the [section on vaccination number limits in the National Immunization Guidelines](https://www.kdca.go.kr/bbs/kdca/55/306844/download.do).\n\n### Managing vaccine storage, transfers, and disposal\n\nVaccine management involves checking both inventory and storage conditions. Redistribution means transferring surplus vaccines to another institution for allocation. Redistribution, returns, and disposal must follow the guidelines for each vaccine.\n\nThe Korea Disease Control and Prevention Agency also announced improvements to procedures for responding to temperature excursions. These were included in the measures to strengthen vaccination safety announced on September 30, 2026. The announced improvement plans must not all be interpreted as procedures already in place. The source is the [Measures to Strengthen Vaccine Quality Control and Vaccination Safety in the National Immunization Program](https://www.kdca.go.kr/bbs/kdca/42/310073/download.do).\n\n## Can someone be considered unvaccinated if there is no record?\n\nThe absence of a record on the search screen alone is not enough to conclude that someone is unvaccinated. There may be a delay between vaccination and registration in the system. The request for same-day registration can be understood as a measure to reduce this gap.\n\n| Situation identified | Interpretation | Necessary checks |\n| --- | --- | --- |\n| A vaccination record exists for this season | A completed vaccination is confirmed | Check whether the person is eligible for an additional dose |\n| No record exists, but the person says they were vaccinated | There is a discrepancy in the vaccination history | Cross-check the vaccination provider and date |\n| The person cannot remember the vaccine name | They may have confused flu and COVID-19 vaccines | Check records for each vaccine |\n| Vaccination is also being provided at another institution | Information must be checked between institutions | Check vaccination and registration records at each institution |\n\nThis table is a verification framework that connects vaccination history checks with the principle of same-day registration. It is not an analysis establishing the causes of actual incidents. A guardian's recollection or appointment records must also be distinguished from actual vaccination records.\n\n## Responding to a vaccination error\n\nHealthcare providers must disclose the vaccination error and report it to the public health center. The absence of symptoms does not justify withholding this information. Monitoring for adverse events and deciding whether revaccination is needed are handled separately.\n\n1. Inform the vaccine recipient or guardian of the vaccination error.\n2. Report the incident to the local public health center.\n3. Check the vaccine and vaccination details to classify the type of error.\n4. Determine whether revaccination is needed according to the guidelines for that error type.\n5. Monitor for adverse events and document follow-up actions.\n\nDuplicate vaccination and administration of an expired vaccine are different errors. Even with the same vaccine, the response may differ depending on the type of error. No blanket conclusion should be made about whether an individual needs revaccination. The latest response table is available in the [Notice of Revisions to the 2026 National Immunization Guidelines](https://www.kdca.go.kr/kdca/2861/subview.do?enc=Zm5jdDF8QEB8JTJGYmJzJTJGa2RjYSUyRjU1JTJGMzA5NjgzJTJGYXJ0Y2xWaWV3LmRvJTNG).\n\n## Common misconceptions and frequently asked questions\n\nDose requirements, eligibility for government funding, and vaccination records must be considered separately. The questions below address misconceptions that arise when these criteria overlap. Whether an individual should be vaccinated is determined through a healthcare professional's pre-vaccination assessment.\n\n### Is receiving flu and COVID-19 vaccines on the same day a vaccination error?\n\nReceiving the two vaccines on the same day is not itself a vaccination error. The Korea Disease Control and Prevention Agency recommends coadministration. Each vaccine must be given at a different site.\n\n### Is a second dose for an immunocompromised person also duplicate vaccination?\n\nA second dose given according to the guidelines differs from unnecessary duplicate vaccination. This season, immunocompromised people receive 2 doses per year. The specific schedule is determined after checking their previous vaccination history and condition.\n\n### Has vaccination already started for high-risk groups under 12?\n\nThe October 19, 2026 guidance states that their schedule will be announced separately. It specifies that emergency vaccine procurement procedures are underway. Subsequent schedules must be checked through Immunization Assistant or a public health center.\n\n### Can I go home immediately after vaccination?\n\nThe Korea Disease Control and Prevention Agency advises observation at the vaccination provider for **20~30 minutes**. This time is intended to check for adverse events after vaccination. Observation is not skipped because vaccines were coadministered.\n\n### Are reported vaccination errors the same as cases of side effects?\n\nThe number of reported vaccination errors and the number of adverse events are not the same measure. A vaccination error refers to an error in vaccination criteria or administration methods. Adverse events require separate verification and assessment.\n\n### Can I receive government-funded vaccination outside my area of residence?\n\nVaccination is available at designated healthcare providers or public health centers regardless of your address. Check whether the institution can provide the vaccination before visiting. You can check through the designated healthcare provider search on Immunization Assistant.","content_html":"\u003cp\u003eReceiving COVID-19 and flu vaccines at the same visit is recommended. This differs from unnecessary duplicate vaccination, which means receiving the same vaccine again without a need. Healthcare providers must check vaccination histories before administering vaccines. After vaccination, they must register the records that same day.\u003c/p\u003e\n\u003cp\u003eEligibility and schedules are based on the Korea Disease Control and Prevention Agency's program guidance dated October 19, 2026.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#the-difference-between-flu-coadministration-and-duplicate-vaccination\" class=\"anchor\" id=\"the-difference-between-flu-coadministration-and-duplicate-vaccination\"\u003e\u003c/a\u003eThe difference between flu coadministration and duplicate vaccination\u003c/h2\u003e\n\u003cp\u003eCoadministration means receiving vaccines that prevent different infectious diseases on the same day. The official name for flu is influenza. The Korea Disease Control and Prevention Agency recommends coadministration of COVID-19 and influenza vaccines. They must be given at different injection sites.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCategory\u003c/th\u003e\n\u003cth\u003eMeaning\u003c/th\u003e\n\u003cth\u003eWhat to check\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Category\"\u003eCOVID-19 and flu coadministration\u003c/td\u003e\n\u003ctd data-label=\"Meaning\"\u003eReceiving different vaccines on the same day\u003c/td\u003e\n\u003ctd data-label=\"What to check\"\u003eCheck the vaccination requirements for each vaccine and administer them at different sites\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Category\"\u003eUnnecessary duplicate vaccination\u003c/td\u003e\n\u003ctd data-label=\"Meaning\"\u003eReceiving another dose after completing the required vaccinations\u003c/td\u003e\n\u003ctd data-label=\"What to check\"\u003eCheck previous vaccination dates, vaccines received, and whether vaccination for this season has been completed\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Category\"\u003eAdditional vaccination according to guidelines\u003c/td\u003e\n\u003ctd data-label=\"Meaning\"\u003eGiving additional doses required for specific groups\u003c/td\u003e\n\u003ctd data-label=\"What to check\"\u003eCheck immune status and the applicable vaccination schedule\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eA second dose alone does not establish that a vaccination error has occurred. Separate dose requirements apply to immunocompromised people. The recommendation for coadministration also does not mean that individual contraindication checks can be skipped. The source is the Korea Disease Control and Prevention Agency's \u003ca href=\"https://cert.kdca.go.kr/irhp/covd/goCov19Vcnt.do?menuCd=47\u0026amp;menuLv=4\"\u003eCOVID-19 National Immunization Program Guidelines\u003c/a\u003e.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#eligibility-and-vaccination-schedules-for-the-20262027-season\" class=\"anchor\" id=\"eligibility-and-vaccination-schedules-for-the-20262027-season\"\u003e\u003c/a\u003eEligibility and vaccination schedules for the 2026~2027 season\u003c/h2\u003e\n\u003cp\u003ePeople aged 65 or older and designated high-risk groups are eligible for government-funded vaccination. This season, COVID-19 vaccination was designated an essential immunization. This change does not mean that vaccination is free for all ages.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eEligible group\u003c/th\u003e\n\u003cth\u003eBirth date or age criteria\u003c/th\u003e\n\u003cth\u003eStart date\u003c/th\u003e\n\u003cth\u003eEnd date\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Eligible group\"\u003ePeople aged 70 or older\u003c/td\u003e\n\u003ctd data-label=\"Birth date or age criteria\"\u003eBorn on or before December 31, 1956\u003c/td\u003e\n\u003ctd data-label=\"Start date\"\u003eOctober 12, 2026\u003c/td\u003e\n\u003ctd data-label=\"End date\"\u003eJune 30, 2027\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Eligible group\"\u003ePeople aged 65~69\u003c/td\u003e\n\u003ctd data-label=\"Birth date or age criteria\"\u003eBorn from January 1, 1957, through December 31, 1961\u003c/td\u003e\n\u003ctd data-label=\"Start date\"\u003eOctober 15, 2026\u003c/td\u003e\n\u003ctd data-label=\"End date\"\u003eJune 30, 2027\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Eligible group\"\u003eImmunocompromised people, inpatients and residents of facilities vulnerable to infection\u003c/td\u003e\n\u003ctd data-label=\"Birth date or age criteria\"\u003eAged at least 12 at the time of vaccination\u003c/td\u003e\n\u003ctd data-label=\"Start date\"\u003eOctober 12, 2026\u003c/td\u003e\n\u003ctd data-label=\"End date\"\u003eJune 30, 2027\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Eligible group\"\u003eImmunocompromised people under 12, inpatients and residents under 12 of facilities vulnerable to infection\u003c/td\u003e\n\u003ctd data-label=\"Birth date or age criteria\"\u003eDetailed eligibility recommendations must be checked\u003c/td\u003e\n\u003ctd data-label=\"Start date\"\u003eSeparate announcement after vaccines become available\u003c/td\u003e\n\u003ctd data-label=\"End date\"\u003eSeparate schedule must be checked\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eThis table shows the COVID-19 vaccination schedule. It must not be treated as the full schedule for the flu vaccination program. High-risk groups under 12 must be distinguished from the schedule above for those aged 12 or older. Being eligible and the actual start of vaccination are separate matters.\u003c/p\u003e\n\u003cp\u003eThe vaccines covered this season are Pfizer's and Moderna's XFG vaccines. The standard schedule is 1 dose per year. Immunocompromised people receive 2 doses per year. Hematopoietic stem cell transplant patients require a clinical assessment under separate criteria.\u003c/p\u003e\n\u003cp\u003eImmunocompromised status is not determined solely by a disease name. Treatment details and age-specific criteria are checked together. Facilities vulnerable to infection must also fall within the categories specified in the guidelines. The detailed source is the Korea Disease Control and Prevention Agency's \u003ca href=\"https://www.kdca.go.kr/bbs/kdca/42/309792/download.do\"\u003eImplementation Plan for the 2026~2027 Season\u003c/a\u003e.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#findings-from-the-october-request-to-prevent-vaccination-errors\" class=\"anchor\" id=\"findings-from-the-october-request-to-prevent-vaccination-errors\"\u003e\u003c/a\u003eFindings from the October request to prevent vaccination errors\u003c/h2\u003e\n\u003cp\u003eThe recent request for cooperation focused on checks before vaccination and same-day registration. The Korean Hospital Association posted the request on October 19, 2026. The supporting document is an official notice from the Korea Disease Control and Prevention Agency dated October 16, 2026.\u003c/p\u003e\n\u003cp\u003eThe Korean Hospital Association's “Request for Cooperation Regarding the Influenza and COVID-19 National Immunization Programs” requested the following checks and actions.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003eChecking vaccine expiration dates and condition, and registering vaccination details in the system on the day of vaccination, among other measures\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cp\u003eThe numbers of reported vaccination errors listed in the posting are below. These figures reflect reports received as of the request for cooperation. They must not be read as cumulative totals through October 27, 2026.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eVaccine\u003c/th\u003e\n\u003cth\u003eReports for the 2026~2027 season\u003c/th\u003e\n\u003cth\u003ePrevious season's reports listed in the posting\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Vaccine\"\u003eInfluenza\u003c/td\u003e\n\u003ctd data-label=\"Reports for the 2026~2027 season\"\u003e57\u003c/td\u003e\n\u003ctd data-label=\"Previous season's reports listed in the posting\"\u003e5\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Vaccine\"\u003eCOVID-19\u003c/td\u003e\n\u003ctd data-label=\"Reports for the 2026~2027 season\"\u003e8\u003c/td\u003e\n\u003ctd data-label=\"Previous season's reports listed in the posting\"\u003e5\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eReport counts alone cannot be used to calculate an individual's risk of a vaccination error. The posting does not include the total number of vaccinations needed to calculate an incidence rate. The text also does not specify the exact periods being compared. The figures come from the \u003ca href=\"https://shop.kha.or.kr/kha_home/notice_list.do?article.offset=0\u0026amp;articleLimit=10\u0026amp;articleNo=47651\u0026amp;mode=view\"\u003eKorean Hospital Association's request for cooperation\u003c/a\u003e.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#checks-before-and-after-vaccination\" class=\"anchor\" id=\"checks-before-and-after-vaccination\"\u003e\u003c/a\u003eChecks before and after vaccination\u003c/h2\u003e\n\u003cp\u003ePreventing vaccination errors extends from identifying the recipient to registering the vaccination afterward. Completing a pre-vaccination screening questionnaire is one step in this process. Completing the questionnaire alone does not mean that the vaccine and vaccination history have been checked.\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003eVerify the person's identity using at least two pieces of information, such as their name and date of birth.\u003c/li\u003e\n\u003cli\u003eLook up previous vaccination records in the system.\u003c/li\u003e\n\u003cli\u003eCheck contraindications and precautions through the screening questionnaire and a medical examination.\u003c/li\u003e\n\u003cli\u003eCross-check the recipient and vaccine again immediately before administration.\u003c/li\u003e\n\u003cli\u003eCheck the vaccine's type, dose, expiration date, and condition.\u003c/li\u003e\n\u003cli\u003eRegister the vaccination in the system immediately afterward.\u003c/li\u003e\n\u003cli\u003eExplain precautions and monitor for adverse events.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cp\u003eThe 2026 National Immunization Guidelines also require similar vaccines to be stored separately. Refrigerator temperature and expiration date checks are part of routine management. These requirements apply alongside visual checks on the day of vaccination. The source is the \u003ca href=\"https://kdca.go.kr/bbs/kdca/55/307748/download.do\"\u003evaccination safety section of the 2026 National Immunization Guidelines\u003c/a\u003e.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#screening-questionnaires-and-limits-on-vaccination-numbers\" class=\"anchor\" id=\"screening-questionnaires-and-limits-on-vaccination-numbers\"\u003e\u003c/a\u003eScreening questionnaires and limits on vaccination numbers\u003c/h3\u003e\n\u003cp\u003eScreening questionnaires and limits on vaccination numbers are safeguards to prevent verification steps from being skipped. Whether vaccines are coadministered and how forms are managed must be understood separately. The latest screening questionnaire is available in the vaccination guidelines on Immunization Assistant.\u003c/p\u003e\n\u003cp\u003eThe 2026 guidelines set a maximum of 100 people per day for each physician conducting pre-vaccination examinations. Influenza and COVID-19 vaccinations are counted separately. Because some categories, such as paid vaccinations, are excluded, this differs from the total number of visitors. Details on how the limit applies must be checked in the \u003ca href=\"https://www.kdca.go.kr/bbs/kdca/55/306844/download.do\"\u003esection on vaccination number limits in the National Immunization Guidelines\u003c/a\u003e.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#managing-vaccine-storage-transfers-and-disposal\" class=\"anchor\" id=\"managing-vaccine-storage-transfers-and-disposal\"\u003e\u003c/a\u003eManaging vaccine storage, transfers, and disposal\u003c/h3\u003e\n\u003cp\u003eVaccine management involves checking both inventory and storage conditions. Redistribution means transferring surplus vaccines to another institution for allocation. Redistribution, returns, and disposal must follow the guidelines for each vaccine.\u003c/p\u003e\n\u003cp\u003eThe Korea Disease Control and Prevention Agency also announced improvements to procedures for responding to temperature excursions. These were included in the measures to strengthen vaccination safety announced on September 30, 2026. The announced improvement plans must not all be interpreted as procedures already in place. The source is the \u003ca href=\"https://www.kdca.go.kr/bbs/kdca/42/310073/download.do\"\u003eMeasures to Strengthen Vaccine Quality Control and Vaccination Safety in the National Immunization Program\u003c/a\u003e.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#can-someone-be-considered-unvaccinated-if-there-is-no-record\" class=\"anchor\" id=\"can-someone-be-considered-unvaccinated-if-there-is-no-record\"\u003e\u003c/a\u003eCan someone be considered unvaccinated if there is no record?\u003c/h2\u003e\n\u003cp\u003eThe absence of a record on the search screen alone is not enough to conclude that someone is unvaccinated. There may be a delay between vaccination and registration in the system. The request for same-day registration can be understood as a measure to reduce this gap.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSituation identified\u003c/th\u003e\n\u003cth\u003eInterpretation\u003c/th\u003e\n\u003cth\u003eNecessary checks\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Situation identified\"\u003eA vaccination record exists for this season\u003c/td\u003e\n\u003ctd data-label=\"Interpretation\"\u003eA completed vaccination is confirmed\u003c/td\u003e\n\u003ctd data-label=\"Necessary checks\"\u003eCheck whether the person is eligible for an additional dose\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Situation identified\"\u003eNo record exists, but the person says they were vaccinated\u003c/td\u003e\n\u003ctd data-label=\"Interpretation\"\u003eThere is a discrepancy in the vaccination history\u003c/td\u003e\n\u003ctd data-label=\"Necessary checks\"\u003eCross-check the vaccination provider and date\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Situation identified\"\u003eThe person cannot remember the vaccine name\u003c/td\u003e\n\u003ctd data-label=\"Interpretation\"\u003eThey may have confused flu and COVID-19 vaccines\u003c/td\u003e\n\u003ctd data-label=\"Necessary checks\"\u003eCheck records for each vaccine\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Situation identified\"\u003eVaccination is also being provided at another institution\u003c/td\u003e\n\u003ctd data-label=\"Interpretation\"\u003eInformation must be checked between institutions\u003c/td\u003e\n\u003ctd data-label=\"Necessary checks\"\u003eCheck vaccination and registration records at each institution\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eThis table is a verification framework that connects vaccination history checks with the principle of same-day registration. It is not an analysis establishing the causes of actual incidents. A guardian's recollection or appointment records must also be distinguished from actual vaccination records.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#responding-to-a-vaccination-error\" class=\"anchor\" id=\"responding-to-a-vaccination-error\"\u003e\u003c/a\u003eResponding to a vaccination error\u003c/h2\u003e\n\u003cp\u003eHealthcare providers must disclose the vaccination error and report it to the public health center. The absence of symptoms does not justify withholding this information. Monitoring for adverse events and deciding whether revaccination is needed are handled separately.\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003eInform the vaccine recipient or guardian of the vaccination error.\u003c/li\u003e\n\u003cli\u003eReport the incident to the local public health center.\u003c/li\u003e\n\u003cli\u003eCheck the vaccine and vaccination details to classify the type of error.\u003c/li\u003e\n\u003cli\u003eDetermine whether revaccination is needed according to the guidelines for that error type.\u003c/li\u003e\n\u003cli\u003eMonitor for adverse events and document follow-up actions.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cp\u003eDuplicate vaccination and administration of an expired vaccine are different errors. Even with the same vaccine, the response may differ depending on the type of error. No blanket conclusion should be made about whether an individual needs revaccination. The latest response table is available in the \u003ca href=\"https://www.kdca.go.kr/kdca/2861/subview.do?enc=Zm5jdDF8QEB8JTJGYmJzJTJGa2RjYSUyRjU1JTJGMzA5NjgzJTJGYXJ0Y2xWaWV3LmRvJTNG\"\u003eNotice of Revisions to the 2026 National Immunization Guidelines\u003c/a\u003e.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#common-misconceptions-and-frequently-asked-questions\" class=\"anchor\" id=\"common-misconceptions-and-frequently-asked-questions\"\u003e\u003c/a\u003eCommon misconceptions and frequently asked questions\u003c/h2\u003e\n\u003cp\u003eDose requirements, eligibility for government funding, and vaccination records must be considered separately. The questions below address misconceptions that arise when these criteria overlap. Whether an individual should be vaccinated is determined through a healthcare professional's pre-vaccination assessment.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#is-receiving-flu-and-covid-19-vaccines-on-the-same-day-a-vaccination-error\" class=\"anchor\" id=\"is-receiving-flu-and-covid-19-vaccines-on-the-same-day-a-vaccination-error\"\u003e\u003c/a\u003eIs receiving flu and COVID-19 vaccines on the same day a vaccination error?\u003c/h3\u003e\n\u003cp\u003eReceiving the two vaccines on the same day is not itself a vaccination error. The Korea Disease Control and Prevention Agency recommends coadministration. Each vaccine must be given at a different site.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#is-a-second-dose-for-an-immunocompromised-person-also-duplicate-vaccination\" class=\"anchor\" id=\"is-a-second-dose-for-an-immunocompromised-person-also-duplicate-vaccination\"\u003e\u003c/a\u003eIs a second dose for an immunocompromised person also duplicate vaccination?\u003c/h3\u003e\n\u003cp\u003eA second dose given according to the guidelines differs from unnecessary duplicate vaccination. This season, immunocompromised people receive 2 doses per year. The specific schedule is determined after checking their previous vaccination history and condition.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#has-vaccination-already-started-for-high-risk-groups-under-12\" class=\"anchor\" id=\"has-vaccination-already-started-for-high-risk-groups-under-12\"\u003e\u003c/a\u003eHas vaccination already started for high-risk groups under 12?\u003c/h3\u003e\n\u003cp\u003eThe October 19, 2026 guidance states that their schedule will be announced separately. It specifies that emergency vaccine procurement procedures are underway. Subsequent schedules must be checked through Immunization Assistant or a public health center.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#can-i-go-home-immediately-after-vaccination\" class=\"anchor\" id=\"can-i-go-home-immediately-after-vaccination\"\u003e\u003c/a\u003eCan I go home immediately after vaccination?\u003c/h3\u003e\n\u003cp\u003eThe Korea Disease Control and Prevention Agency advises observation at the vaccination provider for \u003cstrong\u003e20~30 minutes\u003c/strong\u003e. This time is intended to check for adverse events after vaccination. Observation is not skipped because vaccines were coadministered.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#are-reported-vaccination-errors-the-same-as-cases-of-side-effects\" class=\"anchor\" id=\"are-reported-vaccination-errors-the-same-as-cases-of-side-effects\"\u003e\u003c/a\u003eAre reported vaccination errors the same as cases of side effects?\u003c/h3\u003e\n\u003cp\u003eThe number of reported vaccination errors and the number of adverse events are not the same measure. A vaccination error refers to an error in vaccination criteria or administration methods. Adverse events require separate verification and assessment.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#can-i-receive-government-funded-vaccination-outside-my-area-of-residence\" class=\"anchor\" id=\"can-i-receive-government-funded-vaccination-outside-my-area-of-residence\"\u003e\u003c/a\u003eCan I receive government-funded vaccination outside my area of residence?\u003c/h3\u003e\n\u003cp\u003eVaccination is available at designated healthcare providers or public health centers regardless of your address. Check whether the institution can provide the vaccination before visiting. You can check through the designated healthcare provider search on Immunization Assistant.\u003c/p\u003e\n","tags":["National immunization","COVID-19","Influenza"],"faqs":[{"question":"Can you get the COVID-19 and flu vaccines on the same day?","answer":"The Korea Disease Control and Prevention Agency recommends coadministration of the two vaccines. They must be given at different injection sites."},{"question":"How does coadministration differ from duplicate vaccination?","answer":"Coadministration means receiving different vaccines on the same day. Unnecessary duplicate vaccination means receiving the same vaccine again after completing the required vaccinations."},{"question":"Who is eligible for the national COVID-19 vaccination program for the 2026~2027 season?","answer":"People aged at least 65, people who are immunocompromised, and inpatients and residents of facilities vulnerable to infection are eligible. Those in high-risk groups must check the detailed criteria."},{"question":"Has the vaccination schedule been set for people under 12 in high-risk groups?","answer":"The program guidance dated October 19, 2026, specified that separate guidance would be provided after the vaccine was introduced. The subsequent schedule must be checked through Immunization Assistant or a public health center."},{"question":"Why must vaccination records be entered on the day of vaccination?","answer":"This ensures that records needed to determine the next vaccination are available. If registration is delayed, the actual vaccination may not be reflected when another institution checks the records."},{"question":"Does a vaccination error require revaccination?","answer":"Not all vaccination errors require revaccination. Medical staff must decide based on the type of error and the response guidelines for each vaccine."},{"question":"Must a vaccination error be reported even if there are no symptoms afterward?","answer":"The healthcare facility must report the error to the public health center and inform the vaccine recipient. Monitoring for adverse reactions is conducted separately."},{"question":"How long should you be monitored after vaccination?","answer":"The implementation plan for the 2026~2027 season advises monitoring for adverse reactions at the vaccination facility for 20~30 minutes."}],"sources":[{"url":"https://shop.kha.or.kr/kha_home/notice_list.do?article.offset=0\u0026articleLimit=10\u0026articleNo=47651\u0026mode=view","title":"Korean Hospital Association, Request for Cooperation on the National Influenza and COVID-19 Immunization Programs, October 19, 2026","type":"source"},{"url":"https://cert.kdca.go.kr/irhp/covd/goCov19Vcnt.do?menuCd=47\u0026menuLv=4","title":"Korea Disease Control and Prevention Agency Immunization Helper, Guide to the National COVID-19 Immunization Program, Last Reviewed October 19, 2026","type":"source"},{"url":"https://www.kdca.go.kr/bbs/kdca/42/309792/download.do","title":"Korea Disease Control and Prevention Agency, Announcement of the Implementation Plan for the National COVID-19 Immunization Program for the 2026~2027 Season, September 17, 2026","type":"source"},{"url":"https://kdca.go.kr/bbs/kdca/55/307748/download.do","title":"Korea Disease Control and Prevention Agency, 2026 National Immunization Guidelines for Medical Institutions, Vaccination Safety Section","type":"source"},{"url":"https://www.kdca.go.kr/bbs/kdca/55/306844/download.do","title":"Korea Disease Control and Prevention Agency, 2026 National Immunization Guidelines for Medical Institutions, Limit on the Number of Vaccination Recipients per Pre-Vaccination Screening Physician","type":"source"},{"url":"https://www.kdca.go.kr/bbs/kdca/42/310073/download.do","title":"Korea Disease Control and Prevention Agency and Ministry of Food and Drug Safety, Measures to Strengthen Vaccine Quality Control and Vaccination Safety in the National Immunization Program, September 30, 2026","type":"source"},{"url":"https://www.kdca.go.kr/kdca/2861/subview.do?enc=Zm5jdDF8QEB8JTJGYmJzJTJGa2RjYSUyRjU1JTJGMzA5NjgzJTJGYXJ0Y2xWaWV3LmRvJTNG","title":"Korea Disease Control and Prevention Agency, 2026 National Immunization Guidelines, Notice of Revisions Dated October 2, 2026","type":"source"},{"url":"https://nip.kdca.go.kr/irhp/infm/goVcntInfo.do?menuCd=162\u0026menuLv=1","title":"Korea Disease Control and Prevention Agency Immunization Helper, List of Immunization Guidelines","type":"source"}],"images":[{"id":2184,"url":"https://injoys.com/rails/active_storage/blobs/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MzM2MDMsInB1ciI6ImJsb2JfaWQifX0=--f6b80c58d58d2655208533304371931f75742981/ai-6f6ca923.webp","is_representative":true,"generation_method":"ai_photo","license":"ai_generated","mime_type":"image/webp","width":1536,"height":1024,"translations":{"ko":{"alt":"왼쪽 위팔에 작은 반창고를 붙인 노년 남성의 오른쪽 위팔에 간호사가 주사를 놓고 있다.","caption":"코로나19와 독감 백신은 서로 다른 부위에 동시접종할 수 있다.","description":null},"en":{"alt":"A nurse injects an older man's right upper arm, with a small dressing on his left upper arm.","caption":"COVID-19 and influenza vaccines can be given at the same visit at different injection sites.","description":null},"ja":{"alt":"左上腕に小さな絆創膏を貼った高齢男性の右上腕に、看護師が注射している。","caption":"新型コロナとインフルエンザのワクチンは、異なる部位に同時接種できる。","description":null},"es":{"alt":"Una enfermera inyecta el brazo derecho de un hombre mayor, que lleva un apósito en el izquierdo.","caption":"Las vacunas contra la COVID-19 y la gripe pueden administrarse en la misma visita en sitios distintos.","description":null},"id":{"alt":"Perawat menyuntik lengan kanan seorang pria lansia, sementara lengan kirinya berplester kecil.","caption":"Vaksin COVID-19 dan influenza dapat diberikan pada kunjungan yang sama di lokasi suntikan berbeda.","description":null},"pt":{"alt":"Uma enfermeira aplica uma injeção no braço direito de um idoso, que tem um curativo no braço esquerdo.","caption":"As vacinas contra a COVID-19 e a gripe podem ser administradas na mesma visita em locais distintos.","description":null},"zh-hant":{"alt":"護理師正在為一名年長男子的右上臂注射，他的左上臂貼著小塊敷料。","caption":"新冠與流感疫苗可於同次就診時在不同部位接種。","description":null},"de":{"alt":"Eine Pflegekraft spritzt einem älteren Mann in den rechten Oberarm; links trägt er ein Pflaster.","caption":"COVID-19- und Grippeimpfstoffe können beim selben Termin an unterschiedlichen Stellen verabreicht werden.","description":null}}},{"id":2185,"url":"https://injoys.com/rails/active_storage/blobs/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MzM2MDksInB1ciI6ImJsb2JfaWQifX0=--2ac314205002b9cd40ccdb556dbca0c98855a382/ai-fc1d87c6.webp","is_representative":false,"generation_method":"ai_semi","license":"ai_generated","mime_type":"image/webp","width":1536,"height":1024,"translations":{"ko":{"alt":"햇살이 드는 진료소 대기실에서 외투를 무릎에 놓고 청록색 근무복의 간호사와 대화하는 노년 여성","caption":"65세 이상은 2026~2027절기 코로나19 국가예방접종 대상에 포함된다.","description":null},"en":{"alt":"An older woman with a coat on her lap talks with a nurse in teal scrubs in a sunlit clinic waiting area.","caption":"People aged 65 and older are eligible for the 2026–2027 national COVID-19 vaccination program.","description":null},"ja":{"alt":"日差しが入る診療所の待合室で、上着を膝に置き、青緑色のスクラブを着た看護師と話す高齢女性","caption":"65歳以上は、2026～2027シーズンの新型コロナウイルス国家予防接種の対象に含まれる。","description":null},"es":{"alt":"Una mujer mayor con un abrigo en el regazo conversa con una enfermera en una sala de espera soleada.","caption":"Las personas de 65 años o más están incluidas en el programa nacional de vacunación contra la COVID-19 de 2026–2027.","description":null},"id":{"alt":"Perempuan lansia dengan jaket di pangkuannya berbincang dengan perawat di ruang tunggu klinik yang terang.","caption":"Orang berusia 65 tahun ke atas termasuk sasaran program vaksinasi COVID-19 nasional musim 2026–2027.","description":null},"pt":{"alt":"Uma mulher idosa com um casaco no colo conversa com uma enfermeira numa sala de espera ensolarada.","caption":"Pessoas com 65 anos ou mais estão incluídas no programa nacional de vacinação contra a COVID-19 de 2026–2027.","description":null},"zh-hant":{"alt":"一名年長女性把外套放在膝上，在陽光明亮的診所候診區與穿著藍綠色工作服的護理師交談。","caption":"65歲以上者屬於2026至2027年度新冠疫苗國家接種計畫的適用對象。","description":null},"de":{"alt":"Eine ältere Frau mit Mantel auf dem Schoß spricht im sonnigen Wartebereich mit einer Pflegekraft in türkisem Kasack.","caption":"Menschen ab 65 Jahren gehören zur Zielgruppe des nationalen COVID-19-Impfprogramms für die Saison 2026–2027.","description":null}}}],"published_at":"2026-10-27T19:19:44+09:00","updated_at":"2026-10-27T19:19:44+09:00","license":"cc_by","translation_status":"reviewed","available_locales":["ko","en","ja","es"],"data_locales":["ko","en","ja","es","id","pt","zh-hant","de"],"url":"https://injoys.com/en/articles/covid19-vaccination-2026-flu-coadministration-error-prevention"}