National Institutes of Health Director Jay Bhattacharya responded to complaints from nearly 4,500 of his scientist employees protesting his leadership of the premier biomedical research agency.

Bhattacharya responded in a social media post on X to the complaints of thousands of NIH employees who signed a petition-style complaint about problems the agency has experienced since Secretary Robert F. Kennedy Jr. took the helm of the Department of Health and Human Services in January.