More than 1,000 current and former Health and Human Services employees penned an open letter Wednesday calling for HHS Secretary Robert F. Kennedy Jr. to either resign or be fired.

The letter — whose signatories were not publicly named — was released at a tense time for the health agency. Last week, Centers for Disease Control and Prevention Director Susan Monarez was fired , and several other top CDC officials resigned from their jobs in protest. Staff are also reeling from layoffs, changes to the vaccine approval system — led by Kennedy, a longtime vaccine skeptic — and a shooting outside the CDC headquarters last month.

Wednesday's letter accused Kennedy of "endangering the nation's health." It cited last week's upheaval at the CDC, the Food and Drug Administration's

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