Contrary to Kennedy's claim that "there are other studies out there," the literature on vaccines and autism is not mixed, unlike many other scientific topics. As David Mandell, a psychiatric epidemiologist at the University of Pennsylvania, previously told us, "Every single rigorous study we have" shows "no association" between autism and vaccination.
The specific paper Kennedy cited — which claims to have found that "[v]accinated children were significantly more likely than the unvaccinated to have been diagnosed" with autism and a variety of other neurodevelopmental disorders — is not rigorous...

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