Donald Trump's selection of Robert F. Kennedy Jr. to be his Health and Human Services secretary drew opposition from former Vice President Mike Pence.

Shares of several vaccine makers including Pfizer and Astrazeneca were down Friday morning following the nomination of Robert Kennedy Jr, to head the Department of Health and Human Services.

Robert F. Kennedy Jr. wants to revisit federal vaccine recommendations, take fluoride out of public water and boost access to raw milk, among other goals.

Kennedy Jr. suggested that the COVID-19 virus was engineered to give Chinese and Ashkenazi Jewish people immunity and the FDA "suppresses" advancements in human health.

NBC News' Berkeley Lovelace Jr. reports that some officials in the Food and Drug Administration are grappling with how to handle their positions if Robert F. Kennedy Jr. takes over as Health and Human Services secretary.

Democratic Colorado Gov. Jared Polis praised President-elect Trump for nominating RFK Jr. to be the next secretary of the Department of Health and Human Services.

This isn’t the first time Polis, who is seen as a possible 2028 Democratic presidential contender, has shown a willingness to butt heads with his party.

President-elect Trump's decision to tap Robert F. Kennedy Jr as his nominee for secretary of Health and Human Services has elicited mixed reactions from Republicans on Capitol Hill. Why it matters: Kennedy — an anti-vaccine activist who previously ran against Trump for president before dropping out and endorsing him — will need to lock down support from key senators to get through the conformation process.