TRUMP says "we do not know" what causes autism but he's aiming to reduce and space out vaccine jabs anyway: “Decades ago, children received only a small fraction of the vaccines required today. In those times, people were much healthier and of course, the high rates of autism now observed did not exist. So there’s a reason for such epidemic rates of autism. And we’re going to bring it back to much closer to where it was. While we do not know exactly what the cause is with respect to autism, it is essential to our research efforts that we have the very best vaccine recommendations in the entire world,” he continued. “So we’re reducing them, we’re changing it to visits over the period of a year, a year and a half, so they get 20% of what they would have gotten in one big shot.”