Flu Vaccines Work

While flu vaccine effectiveness can vary from season to season, every year flu vaccines provide important protections against flu.

Why CDC Estimates Vaccine Effectiveness (VE)

CDC calculates flu vaccine effectiveness (VE) each season for multiple reasons.

Flu Vaccines Key Resources

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CDC Seasonal Flu Vaccine Effectiveness Studies

CDC conducts studies to measure the benefits of seasonal flu vaccination each flu season to help determine how well flu vaccines are working.

Flu Burden Averted from Vaccination

CDC estimates the burden of flu and the impact of annual flu vaccination in the U.S using a model that estimates the numbers of flu illnesses, medical visits and hospitalization prevented by vaccination.

Resources for Health Professionals

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HealthMap Vaccine Finder

Find the Flu Vaccine near you.

Everyone six months of age or older needs a flu vaccine.

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Page last reviewed: June 11, 2021

Content source: Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD)