My WebMD Sign In, Sign Up

Ask Your Question

WebMD Answers

120 Characters remaining
120 Characters remaining
  • First, try and keep your question as short as possible.
  • Include specific words that will help us identify questions that may already have your answer.
  • If you don't find your answer, you can post your question to WebMD Experts and Contributors.


Posted: | Report This Report Question |

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

Related Topics: Reaction, Vaccines

Answers From Experts & Organizations (1)

Director, Immunization Safety Office, CDC
12 Answers
24 Helpful Votes
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.

This answer should not be considered medical advice...down arrowThis answer should not be considered medical advice and should not take the place of a doctor’s visit. Please see the bottom of the page for more information or visit our Terms and Conditions.up arrow

| Report This Report Answer

Was this helpful?


Thanks for your feedback.

1 of 3 found this helpful
Read the Original Article: Expert Q&A: Childhood Vaccine Safety