“Dave Weldon is anti-vaccine, anti-woman and anti-science. He was not qualified to serve as CDC director,” said Colorado Rep. Diana DeGette, the top Democrat on the Energy and Commerce Health Subcommittee in the House.

Whether the withdrawal of Weldon’s nomination is a win for vaccines depends on who Trump nominates next and how much influence Kennedy exerts as the CDC director’s boss.

President Trump's nominee to head the Centers for Disease Control and Prevention is getting ready to appear before Congress. The Senate is being asked to confirm Dr.