I received a flu shot last year and my kids received the nasal mist. When getting the flu shot this year, I asked the pharmacist why it is necessary to get another shot with the same strains this year. She said that our immune response to viral vaccines isn't as long-lasting as our response to bacterial vaccines. She said that the efficacy of a viral vaccine is about 10 months. *Is there any research to support this claim? I was thinking about it, and the big vaccines for kids that are viral are all live: MMR and V. Since my kids received the live flumist, is there research that states that the immune response to a live flu vaccine would last more than one season?
Hi Lesha, I'm afraid that you received incorrect information. The immune response to the vaccine lasts years but they are given yearly because the strains are changed every year. I think that this confuses people so they assume that the vaccine immunity doesn't last long.
But isn't this year's vaccine the same as last year's? I keep hearing this and so I would also wonder why you would need to repeat the shot this year. Or is this year's shot similar but not the same as last year's?
Good to know. I actually didn't get a flu shot last year and my DD was too young for it to be effective. This year I have a new DS (and my husband can't get the flu vax) so DD got the mist at DS's 2week appmnt and I got the shot before I left the hospital. Just wondering why those who got it last year would need to bother. :)