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By Maggie Fox, Health and Science Correspondent WASHINGTON (Reuters) - Federal health officials affirmed the safety of vaccines on Tuesday in an unusual news conference called to counter a growing movement alleging that vaccines can cause autism. Autism activists planned a rally in front of the U.S. Capitol on Wednesday to press their contention that the government has covered up evidence linking autism to a mercury-based product once used in vaccines. They will also demand more research...

By Andrew Stern CHICAGO (Reuters) - Government figures that have been cited to prove that autism is rapidly increasing in the United States are not reliable and thus unsuitable for tracking the disorder, a study said on Tuesday. The U.S. Department of Education figures, based on the number of children receiving special education assistance, have internal "anomalies" and are in conflict with a number of studies on the prevalence of the condition, said the report from Portland State University...