WASHINGTON -- A White House announcement about autism is expected Monday afternoon after President Donald Trump's weekend comment that "I think we found an answer" to the developmental disorder.

Health Secretary Robert F. Kennedy Jr. promised earlier this year to determine the cause of autism by September. That baffled brain experts who say there is no single cause and that the rhetoric appears to ignore decades of science into the genetic and environmental factors that can play a role.

Health and Human Services Secretary Robert F. Kennedy Jr. attends a memorial for Charlie Kirk, Sunday, Sept. 21, 2025, at State Farm Stadium in Glendale, Ariz. AP Photo/Julia Demaree Nikhinson

Here's what we know about autism.

What is autism?

Autism isn't a disease. It's a complex developmental co

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