If seasonal LAIV and 2009 H1N1 monovalent LAIV are not administered on the same day, but are separated by less than 14 days (2 weeks), do either or both doses need to be repeated, and if so, when?
Seasonal LAIV and 2009 H1N1 monovalent LAIV should not be administered at the same visit, and should be separated by at least 28 days (14 days acceptable based on previous studies of attenuated influenza vaccine virus replication and immune response). If accidentally given at the same visit, neither dose needs to be repeated. If given 1-13 days apart, the second dose should be repeated 28 days (14 days acceptable) from the invalid (second) dose.
Related Questions
- If seasonal LAIV and 2009 H1N1 monovalent LAIV are inadvertently given at the same visit, do either or both doses need to be repeated, and if so, when?
- What should medical providers do if the 2009 H1N1 LAIV (nasal spray) is administered to someone over the age of 49?
- What is the minimum interval between doses of seasonal LAIV and 2009 H1N1 monovalent LAIV?
