Is there a vaccine to prevent infection with bird flu?
The viruses in the flu vaccine change each year based on international surveillance and scientists’ estimations about which types and strains of viruses will circulate in a given year. Each vaccine contains three influenza viruses-one A (H3N2) virus, one A (H1N1) virus, and one B virus. About 2 weeks after vaccination, antibodies that provide protection against influenza virus infection develop in the body. A bird flu vaccine is still being developed and is not yet available for use.
