Key Facts

• Robert F. Kennedy Jr. replaced the entire previous panel with new members to form a committee to advise on vaccine policies.
• The panel's new chair is Martin Kulldorff, an epidemiologist who previously worked at Harvard Medical School.
• The committee plans to examine the complete vaccine schedule given to children and how different vaccines interact with each other.
• A separate group will review older vaccines to see if their recommendations need updating.
• This review includes vaccines for hepatitis B, measles, mumps, rubella, and chickenpox.
• The changes have sparked concerns among some experts about reopening debates on vaccine safety that were previously considered settled.
• Kennedy claims conflicts of interest influenced the previous committee, although sources have questioned the validity of these claims.