The No. 1 flu guard: getting the vaccine, says Yoko Furuya, M.D., medical director of infection prevention and control at New York Presbyterian Hospital. The flu shot keeps you protected for about six to eight months, so aim to get it in October. That's well in advance of peak flu season, which typically strikes in January or February. And, for the needle-wary, nasal spray and short-needle options are available.
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