Health and Human Services Secretary Robert F. Kennedy Jr. is testifying before the Senate Finance Committee on Thursday.

The hearing comes a week after Kennedy pressured the brand-new Centers for Disease Control and Prevention director, Susan Monarez, to resign, and when she refused, the White House fired her. Three top CDC officials then resigned in protest.

The hearing's stated focus is the president's 2026 health care agenda and Kennedy's goal to Make America Healthy Again. But Secretary Kennedy is facing questions about CDC leadership in disarray, and his moves to overhaul federal vaccine policy, amid growing calls for his resignation, including from more than a thousand current and former HHS staff and numerous medical groups.

Here are three things to know going into the hearing.

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