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.

Leadership of the CDC's new vaccine advisory committee announced the creation of two new workgroups, including one looking at the cumulative effects of the childhood vaccination schedule.

The advisory committee makes recommendations to the Centers for Disease Control and Prevention on the nation’s vaccine schedule. Any changes could affect vaccinations for millions of children.