The Trump administration has made a major shift on COVID vaccination policy.

Health and Human Services Secretary Robert F. Kennedy Jr., a longtime critic of the COVID vaccine, announced Tuesday that the Centers for Disease Control and Prevention would no longer recommend it for healthy children or healthy pregnant women.

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Dr. Ofer Levy, director of the Precision Vaccines Program at Boston Children's Hospital, said he would have liked to have seen the traditional scientific review process play out before any decisions were made.

"These are complicated topics," Levy said. "In my mind, all the more reason to have convened a committee to discuss this."

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