Vaccine Safety

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Measles Vaccine is Safe and Effective

Get the facts and latest safety studies.

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FAQs on HPV Vaccine Safety

Get answers to frequently asked questions.

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Be a Part of Vaccine Safety

Use VAERS to report health problems following vaccination.

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The United States’ long-standing vaccine safety program closely and constantly monitors the safety of vaccines.

A critical part of the program, CDC’s Immunization Safety Office identifies possible vaccine side effects and conducts studies to determine whether health problems are caused by vaccines.

Data show that the current U.S. vaccine supply is the safest in history.