Content on this page was developed during the 2009-2010 H1N1 pandemic and has not been updated.
- The H1N1 virus that caused that pandemic is now a regular human flu virus and continues to circulate seasonally worldwide.
- The English language content on this website is being archived for historic and reference purposes only.
- For current, updated information on seasonal flu, including information about H1N1, see the CDC Seasonal Flu website.
2009 H1N1 Influenza Vaccine Dose Spacing and Administration with Seasonal Influenza and Other Vaccines
November 20, 2009 1:15 PM EST
Influenza Seasonal LAIV 2 |
Influenza Seasonal Inactivated |
Other live vaccines (e.g. MMR) |
Other inactivated vaccines (e.g. PPV) |
|
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Influenza 2009 H1N1 LAIV Dose 12 |
Vaccines should be separated by at least 28 days preferably, but some experts suggest that 14 days* or longer is acceptable. If given 1-13 days apart, repeat the vaccine administered second at least 14 days* (preferably 28 days) from the invalid (second) dose. Administering both doses at the same visit is not recommended but if they are given at the same visit, neither vaccine needs to be repeated. |
Vaccines can be administered on the same day or any interval (one or more days) between these vaccines is acceptable. |
Vaccines can be administered at the same visit. If not administered at the same visit, vaccines should be separated by at least 28 days. If administered 1-27 days apart repeat the vaccine administered second at least 28 days* from the invalid (second)vaccine. |
Vaccines can be administered on the same day or any interval (one or more days) between these |
Influenza 2009 H1N1 Inactivated Dose 1 |
Vaccines can be administered on the same day or any interval (one or more days) between these vaccines is acceptable. |
Vaccines can be administered on the same day or any interval (one or more days) between these vaccines is acceptable. |
Vaccines can be administered on the same day or any interval (one or more days) between these |
Vaccines can be administered on the same day or any interval (one or more days) between these vaccines is acceptable. |
1Persons 10 and older require only one dose of 2009 H1N1 vaccine. |