influenza vaccine live intranasal; FluMist, FluMist Quadrivalent

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Medical and Pharmacy Editor:

GENERIC NAME: influenza vaccine live, intranasal

BRAND NAME: FluMist, FluMist Quadrivalent

DRUG CLASS AND MECHANISM: FluMist is a nasal vaccine that protects against infection with the influenza virus or the "flu." FluMist contains live influenza virus that has been weakened so that it causes minimal or no symptoms. When FluMist is inhaled, the body responds to the weakened viruses in FluMist by developing antibodies that fight influenza viruses. These antibodies protect against later infections by the naturally-occurring influenza virus.

FluMist is effective only against the strains of influenza virus that are included in it, and the strains of virus change from year to year. FluMist has no effect on the flu once infection has begun. FluMist should be given shortly before the flu season begins to allow time for antibodies to be produced and for protection throughout the entire flu season.

Medically Reviewed by a Doctor on 1/6/2015



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