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Live Well San Diego Website
Click on the logo above to learn more about Live Well San Diego an initiative of the County of San Diego to improve health, safety and well-being for all residents.

San Diego Immunization Program

Vaccine Safety
Vaccines are safe, well-tested and effective in preventing some serious diseases like measles, pertussis (whooping cough) and polio. But, like any medicines, vaccines can have side effects. It’s understandable that people have questions about vaccine safety and effectiveness, especially with the coverage of these subjects by the media. We want to help answer your questions with accurate and reliable information. Not everything you see, hear or read about vaccines in the media or on the Internet is accurate. So, in addition to looking around our website, please visit these other sites for information you can trust:

Centers for Disease Control and Prevention

Children’s Hospital of Philadelphia Vaccine Education Center
(Look in the left hand column of the web page for “Vaccine Safety”)



Hot Topic

Lancet Issues Full Retraction of Wakefield Study
Read a BBC news story about the retraction.