Giving babies Tylenol may blunt vaccine effects

Also, aspirin depresses the immune system, so I expect it might have the same effect. Fever is part of the immune response to infection.

http://www.msnbc.msn.com/id/33331643/ns/health-kids_and_parenting/

updated 6:30 p.m. ET, Thurs., Oct . 15, 2009

Giving babies Tylenol to prevent fever when they get childhood vaccinations may backfire and make the shots a little less effective, surprising new research suggests.

It is the first major study to tie reduced immunity to the use of fever-lowering medicines. Although the effect was small and the vast majority of kids still got enough protection from vaccines, the results make "a compelling case" against routinely giving Tylenol right after vaccination, say doctors from the U.S. Centers for Disease Control and Prevention.

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