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Q.

We hear about adverse events [with vaccines]; is that the same as a dangerous reaction?

Related Topics: Reaction, Vaccines
 

Answers From Experts & Organizations (1)

Immunology
Director, Immunization Safety Office, CDC
12 Answers
19 Helpful Votes
14 Followers
A.
An adverse event following a vaccination can be any health problem that occurs after receipt of the vaccination. It doesn't necessarily have to be caused by the vaccine. Often such events are just coincidence and not caused by the vaccine.  If it is truly caused by the vaccine, it is called a reaction or side effect. The most common reactions that can be caused by vaccines are mild and resolve on their own.  These include pain and redness at the injection site and fever.

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Read the Original Article: Expert Q&A: Childhood Vaccine Safety