Two new studies have identified an alarming connection between exposure to wildfire smoke during pregnancy and autism in young children.

There is no credible evidence that vaccines cause autism. Even the two studies on autism and wildfire smoke do not indicate that wildfire smoke specifically causes autism. Credible experts who study the disorder, including the authors of these studies, agree that a diagnosis is very likely the result of several factors working in tandem.

“All we can point out is this association in the third trimester,” Guglio said. “It takes other people down the line to investigate those pathways more directly.”