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CDPH News Release
January 12, 2018

The California Department of Public Health (CDPH) today announced that flu activity in California is widespread and at levels usually seen at the peak of the influenza season. Health officials encourage Californians to get vaccinated.

“With the increase in influenza impacting many communities across the entire state, it is important to get a flu shot now if you have not done so already,” said CDPH Director and State Public Health Officer Dr. Karen Smith. “Although influenza season usually peaks between December and February, flu activity can occur as late as May, which means it is not too late to get vaccinated.”

It takes about two weeks after vaccination for the body to respond fully. Vaccine effectiveness does vary for the different strains and year by year. Data will be available from the Centers for Disease Control and Prevention (CDC) in February about vaccine effectiveness.

“Vaccination will prevent infection in a large number of cases. If disease does occur after vaccination, the vaccine can reduce the severity of flu symptoms,” said Dr. Smith. "Getting the flu shot is still the best way to protect yourself and others from flu.”

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