Sen. Bernie Sanders (I-VT) is requesting the Senate Committee on Health, Education, Pensions, and Labor to investigate Health and Human Services Secretary Robert F. Kennedy Jr. after he fired all members of a key vaccine panel last week.

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.

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."