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MMR Vaccine Does Not Cause Autism, Says IOM

Cheryl Clark, for HealthLeaders Media, August 26, 2011

During the briefing, several committee members stressed that vaccination side-effects are far less risky than the harm that could be caused by the diseases they prevent.

"People forget what these diseases are like," Wright-Clayton added, giving examples of cases of tetanus and Haemophilus influenza she treated as a resident physician. "They are very bad diseases."

However, the committee determined that there is convincing evidence to support a causal relationship (the first category) between the varicella zoster vaccine to four specific adverse events, all due to infection from the vaccine virus strain, and placed this vaccine in the first category.


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The adverse events that there is convincing evidence are linked to these vaccines include disseminated varicella infection, a widespread chickenpox rash shortly after vaccination, varicella infection with subsequent infection resulting in pneumonia, meningitis or hepatitis in people with immunodeficiencies, vaccine strain viral reactivation – manifested as the appearance of chickenpox rash months to years after vaccination – and vaccine strain viral reactivation with subsequent infection resulting in meningitis or encephalitis, or inflammation of the brain.

Also in the first category is the MMR vaccine, which the committee linked to a disease called "measles inclusion body encephalitis," in which rare cases affect people whose immune systems are compromised usually within a year of acute measles infection or vaccination.

Six types of vaccines, including MMR, varicella zoster, influenza, hepatitis B, meningococcal and tetanus, were linked to anaphylaxis.

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4 comments on "MMR Vaccine Does Not Cause Autism, Says IOM"


Craig (9/14/2011 at 9:23 AM)
No correlation, yeah right. Why did George Bush seal all MMR court cases in 2001??? Why dont the amish, who dont vaccinate, have any autism, add, or adhd??? Its all money to you people...

WaltB (8/26/2011 at 10:34 AM)
"You cannot convince me that there is not a link in some way." This tells me two things: You are not interested in finding out what the truth is, and no one need bother showing any evidence to you anyway.

Pohtikle (8/26/2011 at 9:12 AM)
Old news really. You would think that the 1000 or so studies themselves would have closed this issue already. But once more conclusive evidence is not going to convince those people that choose not to vaccinate their children. I think the problem is more psychological now; if you don't have your children vaccinated then you are intentionally exposing them to harm and thus you are a bad parent. Nobody wants to admit to themselves that they are a bad parent, especially those zealous enough about their children's health to forego vaccination. (exaggerated for emphasis, please don't excoriate me). It almost begs for social psychology experiment.