Key Facts About Seasonal Flu Vaccine

PDF格式见
http://www.cdc.gov/flu/protect/pdf/vaccinekeyfacts.pdf
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' H# u$ W7 V" U. b6 V; T* ^The single best way to protect against the flu is to get vaccinated each year.
There are two types of vaccines:

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The "flu shot"— an inactivated vaccine (containing killed virus) that is given with a needle, usually in the arm. The flu shot is approved for use in people older than 6 months, including healthy people and people with chronic medical conditions.

The nasal-spray flu vaccine — a vaccine made with live, weakened flu viruses that do not cause the flu (sometimes called LAIV for “live attenuated influenza vaccine” or FluMist

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