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 Adverse Event Reporting System
The Vaccine Adverse Event Reporting System (VAERS) is a national system for reporting possible adverse reactions or side effects after any US-licensed vaccine. This article explains how VAERS works and describes its strenghts and limitations.
For Professionals
This section includes links to general immunization recommendations in the United States and other valuable information for health professionals.
News
Updates
Emergence of Avian Influenza A(H7N9) Virus Causing Severe Human Illness — China, February–April 2013
Posted: May 6, 2013
Progress Toward Eradication of Polio — Worldwide, January 2011–March 2013
Posted: May 3, 2013