U.S. Health Secretary Robert F. Kennedy Jr. has appointed eight new members to the federal vaccine advisory panel after abruptly disbanding the previous 17-member group earlier this week.

Of the eight named by Kennedy, perhaps the most experienced in vaccine policy is Meissner, an expert in pediatric infectious diseases at Dartmouth-Hitchcock Medical Center, who has previously served as a member of both ACIP and the Food and Drug Administration’s vaccine advisory panel.