QUOTE
<snip>examined when the children began showing behavioral problems and when they were vaccinated, and it examined bowel biopsies for telltale genetic traces of the MMR vaccine. Since obtaining the biopsies required sedating the children and an invasive procedure, Lipkin said his analysis was limited to a small sample of 38 children who needed the biopsies as part of their medical care.
The researchers studied the biopsies for traces of measles virus RNA. Where a 2002 study had found traces of the measles virus in a high percentage of biopsies taken from autistic children, the new study did not -- and also found no difference in the biopsies of children who were autistic and children of similar age who were not.
Lipkin said the theory linking MMR vaccine to autism involves a chain of events where the live virus in the measles vaccine would grow in the intestinal tract, cause inflammation and trigger formation of toxins that would affect the central nervous system.
If the dramatic results reported in the earlier research were accurate, Lipkin and his coauthors said, they should have found traces of measles RNA in bowel biopsies of a large proportion of the autistic children. Instead, they found such traces in just one child who was autistic and one child who was not. <snip>
The researchers studied the biopsies for traces of measles virus RNA. Where a 2002 study had found traces of the measles virus in a high percentage of biopsies taken from autistic children, the new study did not -- and also found no difference in the biopsies of children who were autistic and children of similar age who were not.
Lipkin said the theory linking MMR vaccine to autism involves a chain of events where the live virus in the measles vaccine would grow in the intestinal tract, cause inflammation and trigger formation of toxins that would affect the central nervous system.
If the dramatic results reported in the earlier research were accurate, Lipkin and his coauthors said, they should have found traces of measles RNA in bowel biopsies of a large proportion of the autistic children. Instead, they found such traces in just one child who was autistic and one child who was not. <snip>
WaPo
