As of Wednesday night the agency's website states: "The claim 'vaccines do not cause autism' is not an evidence-based claim because studies have not ruled out the possibility that infant vaccines cause autism." It added that health authorities have "ignored" studies supporting the link between the two.

The agency kept the header "Vaccines do not cause autism" on its web page, saying that it has not been removed due to an agreement with Senator Bill Cassidy, chairman of the U.S. Senate's Committee on Health, Education, Labor and Pensions.