The Centers for Disease Control and Prevention (CDC) will study whether vaccines cause autism, despite numerous existing studies already showing there is no link.

The CDC’s decision to reinvestigate links between vaccines and autism after decades of scientific inquiry that showed no such connection is a bellwether moment in the anti-public health trajectory of Trump’s fascistic policies.

The U.S. Centers for Disease Control and Prevention is planning a large study into potential connections between vaccines and autism, two sources familiar with the matter told Reuters, despite extensive scientific research that has disproven or failed to find evidence of such links.