President-elect Donald Trump on Thursday has nominated Robert F. Kennedy Jr., an anti-vaccine activist who dropped out of the 2024 presidential race and endorsed Trump, to lead HHS. Donald Trump Jr. shared the news on X, and a source familiar confirmed it with NBC News. During his presidential campaign, Kennedy developed a national profile for his criticism of the COVID vaccine and childhood immunizations. He has claimed that vaccines are tied to autism, despite evidence conveyed through studies over decades that have disproven such a claim. The appointment of Kennedy, 70, to lead HHS ends days of speculation about what health role — if any — the former independent presidential candidate turned Trump advisor would play in the incoming administration.