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CDC Misses Target With Flawed MMR/Autism Study
Date:9/3/2008

NAA says: Wrong Question Asked. Wrong Children Studied. Wrong Conclusions Reached.

NIXA, Mo., Sept. 3 /PRNewswire-USNewswire/ -- A Centers for Disease Control and Prevention (CDC) study released today claims there is no link between the MMR vaccine and autism. The National Autism Association (NAA) says this study does nothing to dispel the growing public concern over a vaccine-autism connection and raises several questions concerning design and methodology.

For years, parents have claimed that MMR triggered their child's subsequent GI (gastrointestinal) disease and autism. In a 2002 paper where the majority of autistic children were found to have measles in their intestines, the children examined showed a clear temporal link between MMR exposure and regression. The CDC's attempt to replicate the 2002 study fell far short of proving the safety of the MMR vaccine.

1. The CDC study was designed to detect persistent measles virus in autistic children with GI problems. The assumption being if there is no measles virus at the long delayed time of biopsy, there is no link between autism and MMR. But NAA says this underlying assumption is wrong. The questions should have been: Do normally developing children meeting all milestones have an MMR shot, develop GI problems and then regress into autism? Do they have evidence of measles and disease in their colons compared to non-vaccinated age and sex matched controls?

2. In the current CDC study, only a small subgroup of children was the correct phenotype to study. From page 7, "Only 5 of 25 subjects (20%) had received MMR before the onset of GI complaints and had also had onset of GI episodes before the onset of AUT (P=0.03)." The other 20 autistic children in the study had GI problems but the pathology developed before the MMR vaccine. Additionally, the controls all received the MMR vaccine and had gastrointestinal symptoms. The controls should have been free of exposure to vaccine measles in order to make a comparison relevant for purposes of causation.

3. Inflammatory bowel disease in the absence of MMR RNA does not mean that MMR shot didn't precipitate the GI disease and didn't precipitate autism. A similar example would be rheumatic fever where the infection is cleared quickly but damage to the heart and/or brain last a lifetime.

Public confidence in the safety of vaccines is at risk until safety studies are performed that are required by law, ethics, and science. NAA calls for a vaccinated vs. non-vaccinated study comparing all health outcomes including autism. The CDC is in charge of vaccine safety, owns patents to vaccines (according to a UPI Investigative Report from 2003) and is in charge of promoting vaccines. The public should demand that vaccine safety be taken away from an agency with such conflicts and support HR#1973, the Vaccine Safety and Public Confidence Assurance Act."

For more information, visit http://www.nationalautism.org.

Contacts:

Wendy Fournier (Portsmouth, RI) 401-835-5828

Rita Shreffler (Nixa, MO) 401-632-6452


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SOURCE National Autism Association
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