Though a strong promoter of vaccinations, Cassidy persuaded wary fellow Republicans to confirm Kennedy, President Donald Trump’s nominee to run the U.S. Department of Health & Human Services.

Democrats on the Senate Health Committee launched an investigation on Tuesday into Health and Human Services Secretary Robert F. Kennedy Jr.’s firing of all members of a Centers for Disease

Burns' position was noted in an April memo from CDC chief of staff Matt Buzzelli that was obtained by MedPage Today editor-in-chief Jeremy Faust, MD. MSNBC reported that Burns supported the anti-vaccine movement as a member of Republican congressional staffs in the 1990s.