The 17 members of the CDC's vaccine advisory committee, who were ousted last week, argued their abrupt dismissal has "left the U.S. vaccine program critically weakened."

Fiona Havers, who oversees CDC respiratory virus data, told colleagues she no longer had confidence the data would be used objectively to set vaccine policy.

Robert F. Kennedy Jr. dismissed all members of the CDC’s Advisory Committee on Immunization Practices, which recommends which shots insurance should cover for specific groups.