How is seasonal flu different than pandemic flu?Information from the County of San Diego Health and Human Services Agency
In the U.S, flu season usually occurs between October and March or April. Seasonal flu vaccine is recommended annually for persons at risk for influenza-related complications, and this year is being given at Public Health Centers and many other locations throughout the County. For more information about pandemic H1N1 influenza, visit the County's H1N1 influenza site.
Federal Centers for Disease Control and Prevention (CDC):
State of California Resources:
County of San Diego Resources:
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