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Seasonal Influenza

Learn More About the Flu Get the Facts on Flu! Prevention is the Best Protection The Flu Costs Us All Get Your Flu Vaccine Every Year

Immunize Against the Flu. EVERY YEAR. EVERY BODY.

Influenza (flu) is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness. Serious outcomes of flu infection can result in hospitalization or death. Some people, such as older people, young children, and people with certain health conditions are at high risk for serious flu complications. The best way to prevent the flu is by getting vaccinated each year.

The upcoming season's flu vaccine will protect against the influenza viruses that research indicates will be most common during the season. This includes an influenza A (H1N1) virus, an influenza A (H3N2) virus, and one or two influenza B viruses, depending on the flu vaccine. To uncover more details about influenza, select any of the four leaves on the clover graphic on this page.

Man and pregnant woman
It is safe, and very important, for a pregnant woman to receive the inactivated flu vaccine. A pregnant woman who gets the flu is at risk for serious complications and hospitalization. To learn more about preventing the flu, visit
the CDC website.

Documents and Information

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New Hampshire Department of Health and Human Services
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