A key federal vaccine advisory panel whose members were recently replaced by Health Secretary Robert F. Kennedy Jr. is expected to vote to recommend delaying, until age 4, the hepatitis B vaccine that's currently given to newborns, according to two former senior officials at the Centers for Disease Control and Prevention.

This story was produced in partnership with KFF Health News.

"There is going to likely be a discussion about hepatitis B vaccine, very specifically trying to dislodge the birth dose of hepatitis B vaccine and to push it later in life," said Demetre Daskalakis, the former director for the National Center for Immunization and Respiratory Diseases. "Apparently this is a priority of the Secretary's."

The vote is expected to take place Thursday during the next meeting of th

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