Vaccine-autism question divides parents, scientists
CNN | April 2, 2008
YUMA, Arizona (CNN) -- At 13, Michelle Cedillo can't speak, wears a diaper and requires round-the-clock monitoring in case she has a seizure. While her peers go to school or the mall or spend time with friends, the Yuma, Arizona, teenager remains at home, where she entertains herself with picture books and "Sesame Street" and "Blue's Clues" DVDs.
Michelle has no idea she is at the center of a court case pitting thousands of families of children with autism against the medical establishment. A number of prestigious medical institutions say there is no link between vaccines and autism. The families believe vaccines caused their children's autism, and they've taken their case to court.
"I think there is a link," says Theresa Cedillo, Michelle's mother.
Theresa and her husband, Mike, say their only child was a happy, engaged toddler who responded to her name, said "mommy" and "daddy" and was otherwise normal until she received a measles, mumps and rubella (MMR) vaccine at 15 months.
They believe the MMR vaccine, combined with a mercury-containing preservative found in that and other vaccines at the time, drastically altered the course of their daughter's development. Within days of receiving the injection as part of the normal course of vaccinations, Michelle suffered from a high fever, persistent vomiting and problems with her digestion. Worse still, her parents say, Michelle stopped speaking and no longer responded to her name.
"I thought it was because she was so sick. I thought certainly she'll start talking again," Theresa recalls. "You think you're dealing with something that's going to come and go, and you're going to get your child back, and you don't." Michelle has since been diagnosed with autism, inflammatory bowel disease, arthritis, osteoporosis and epilepsy.
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Dr. Paul Offit, chief of infectious diseases at the Children's Hospital of Philadelphia, Pennsylvania, says the connection between vaccines and autism is nothing more than a sad coincidence.
"About 20 percent of children with autism will regress between their first and second birthday," says Offit. "So statistically, it will have to happen where some children will get a vaccine. They will have been fine. They will get the vaccine, and they will not be fine anymore. And I think parents can reasonably ask the question, 'Is it the vaccine that did this?'"
The answer is no, according to the Centers for Disease Control and Prevention, the World Health Organization, and the Institute of Medicine.
In reaching its conclusion, the Institute of Medicine pointed to five large studies finding no link between autism and the preservative thimerosal, which contains mercury, and 14 large studies finding no link between the MMR vaccine and autism. Childhood vaccines no longer contain thimerosal, though it remains in some flu shots.

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