people should get vaccinated against the flu as soon as vaccine becomes available in their communities. influenza seasons are unpredictable and can begin as early as october. it takes about two weeks after vaccination for antibodies to develop in the body and provide protection against the flu. even if you get vaccinated in january or later vaccination can still provide protection for the remainder of the flu season. before flu season starts. typically september timeframe if memory servces me correctly. now. every fall
when is the best time to get vaccinated for the flu?