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The proportion of autistic children with developmental regression or
bowel symptoms has not changed over the 20 years from 1979. Taylor and
colleagues (p 393) suggest that neither regression nor bowel problems
are associated with MMR vaccination. These findings provide no support
for a "new variant" form of autism associated with MMR vaccine and
provide further reassurance for parents and health professionals
regarding the safety of the vaccine.

(Credit: JOHNNY GREEN/PA)
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Liam Donaldson, chief medical officer of England, declares MMR
safe