A federal vaccine advisory committee plans to review the childhood vaccination schedule and scrutinize vaccines that have been approved for decades, fueling concerns that the panel may consider changes to long-standing vaccine recommendations.

The newly formed vaccine advisory committee handpicked by Health and Human Services Secretary Robert F. Kennedy Jr. announced that it would examine the cumulative effect of the childhood vaccine schedule and reevaluate hepatitis B immunization recommendations — a move that could shift long-standing practices of how and when children are immunized in the United States.

It is unclear how Kennedy’s new members, including Dr. Robert Malone, will affect the panel’s vaccine recommendations.