The National Network for Immunization Information (NNii) provides up-to-date, science-based information to healthcare professionals, the media, and the public: everyone who needs to know the facts about vaccines and immunization.

Vaccine Safety

Vaccine Safety Datalink

The VSD project was created in 1990 by the Centers for Disease Control and Prevention (CDC) and currently involves partnerships with 8 large health maintenance organizations (HMOs) to continually monitor vaccine safety.

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For Professionals

This section includes links to general immunization recommendations in the United States and other valuable information for health professionals.

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