By Ethan A. Huff(NaturalNews) If vaccines play absolutely no role in the development of childhood autism, a claim made by many medical authorities today, then why are some of the most popular vaccines commonly administered to children demonstrably causing autism in animal primates? This is the question many people are now asking after a recent study conducted by scientists at the University of Pittsburgh (UP) in Pennsylvania revealed that many of the infant monkeys given standard doses of childhood vaccines as part of the new research developed autism symptoms.For their analysis, Laura Hewitson and her colleagues at UP conducted the type of proper safety research on typical childhood vaccination schedules that the U.S. Centers for Disease Control and Prevention (CDC) should have conducted -- but never has -- for such regimens. And what this brave team discovered was groundbreaking, as it completely deconstructs the mainstream myth that vaccines are safe and pose no risk of autism.Presented at the International Meeting for Autism Research (IMFAR) in London, England, the findings revealed that young macaque monkeys given the typical CDC-recommended vaccination schedule from the 1990s, and in appropriate doses for the monkeys' sizes and ages, tended to develop autism symptoms. Their unvaccinated counterparts, on the other hand, developed no such symptoms, which points to a strong connection between vaccines and autism spectrum disorders.Included in the mix were several vaccines containing the toxic additive Thimerosal, a mercury-based compound that has been phased out of some vaccines, but is still present in batch-size influenza vaccines and a few others. Also administered was the controversial measles, mumps, and rubella (MMR) vaccine, which has been linked time and time again to causing autism and various other serious, and often irreversible, health problems in children (http://www.greenhealthwatch.com)"This research underscores the critical need for more investigation into immunizations, mercury, and the alterations seen in autistic children," said Lyn Redwood, director of SafeMinds, a public safety group working to expose the truth about vaccines and autism. "SafeMinds calls for large scale, unbiased studies that look at autism medical conditions and the effects of vaccines given as a regimen."