By MATT BROWN and MIKE STOBBE, The Associated Press

WASHINGTON (AP) — U.S. Health Secretary Robert F. Kennedy Jr., facing pointed bipartisan questioning at a rancorous three-hour Senate committee hearing on Thursday, tried to defend his efforts to pull back COVID-19 vaccine recommendations and explain the turmoil he has created at federal health agencies.

Kennedy said the fired CDC director was untrustworthy, stood by his past anti-vaccine rhetoric, and disputed reports of people saying they have had difficulty getting COVID-19 shots.

A longtime leader in the anti-vaccine movement, Kennedy has made sweeping changes to agencies tasked with public health policy and scientific research by laying off thousands of workers, firing science advisers and remaking vaccine guidelines. The

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