CocoPops
Do you remember Dr.Andrew Wakefield who published his very, very dodgy research in 1998. He claimed the MMR vaccine caused autism and the newspapers latched on to it and the vaccine uptake dropped for a time.
In his first study (on 91 children with autism) Andrew Walker claimed he found a spectacular degree of link between the MMR vaccine and autism (75 of the 91). The paper, published in 1998, was flawed for two reasons (detailed in chop.edu link below)
In 1999, Brent Taylor and co-workers examined the records of 498 children in the North Thames region with autism or autism-like disorder, in an excellent, well-controlled study. (see chop.edu link below)
They found that:-
1) The percentage of children vaccinated was the same in children with autism as in other children in the North Thames region.
2) No difference in the age of diagnosis of autism was found in vaccinated and unvaccinated children.
3) The onset of symptoms of autism did not occur within two, four, or six months of receiving the MMR vaccine.
One of the best studies was performed by Madsen and colleagues in Denmark between 1991 and 1998 and reported in the New England Journal of Medicine. The study included 537,303 children representing 2,129,864 person-years of study. Approximately 82% of children had received the MMR vaccine.
The risk of autism in the group of vaccinated children was the same as that in unvaccinated children. Furthermore, there was no association between the age at the time of vaccination, the time since vaccination, or the date of vaccination and the development of autism.
Subsequent studies and meta-analysis have corroborated the findings that the MMR vaccine does not cause autism.
Andrew Walker resigned from his UK positions 2001 "by mutual agreement", then moved to the United States. In 2004, Wakefield co-founded and began working at the Thoughtful House research centre (later renamed the Johnson Center for Child Health and Development) in Austin, Texas. He served as executive director of the centre until February 2010, when he resigned in the wake of findings against him by the British General Medical Council which had struck him off their register. He has subsequently become known for his anti-vaccination activism.
www.chop.edu/vaccine-education-center/vaccine-safety/vaccines-and-other-conditions/autism
and en.wikipedia.org/wiki/Andrew_Wakefield