The cancellation plays into fears among scientists who worry that Robert F. Kennedy Jr. will use his position as health secretary to sow doubts about vaccines.

A meeting of a committee which advises the U.S. Food and Drug Administration on vaccine policy has been canceled, a committee member told Reuters, the second such disruption to a federal vaccine advisory panel since Robert F.

A seminal, annual meeting updating advisers on next season’s influenza vaccines was abruptly canceled by the Food and Drug Administration. The FDA’s Vaccines and Related Biological Products Advisory Committee was slated to meet on March 13,

It comes as RFK Jr., a vaccine skeptic who now leads the Department of Health and Human Services, makes moves that could affect vaccination uptake and policy.