U.S. Health Secretary Robert F. Kennedy Jr.'s newly reconstituted vaccine advisory panel said during its first meeting on Wednesday that it would study the schedule of childhood and adolescent immunizations and review the use of older vaccines.

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.

Ahead of the first meeting of newly appointed vaccine advisers to the US Centers for Disease Control and Prevention, lawmakers are sharing fresh concerns about the panel’s membership and last-minute actions that could see Covid-19 and influenza vaccines thrown into question.