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.

Days after ousting all 17 members of the panel that makes U.S. vaccine recommendations, Health Secretary Robert F. Kennedy Jr. has begun remaking it. On Wednesday, he named eight appointees, three of whom are critics of mRNA coronavirus vaccines,