The people that president-elect Donald Trump has selected to lead federal health agencies in his second administration include a retired congressman, a surgeon and a former talk-show host.

Johns Hopkins surgeon Dr. Marty Makary is his choice for the FDA and Dr. Janette Nesheiwat is in line to be the next surgeon general. Dr. Dave Weldon of Florida is slated to run the CDC.

Weldon, 71, is a medical doctor and former lawmaker who served in the House, representing Florida. The former congressman has been a strong critic of the CDC, especially its vaccine program. Weldon has championed the long-debunked notion that thimerosal, a vaccine preservative, is linked to autism.