The debate over whether the MMR vaccine can trigger autism and bowel disease is raging as fiercely as ever, thanks to a controversial study linking these problems to the measles virus. MMR first came under suspicion in 1998, when Andrew Wakefield, a gastro-enterologist then at the Royal Free Hospital in London, found that a handful of children developed autism shortly after their MMR shots. The children all had bowel problems too. He couldn't prove a link, but suggested there was cause to worry that the vaccine triggered the symptoms.
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