More than 750 current and former employees of the U.S. Department of Health and Human Services have asked Secretary Robert F. Kennedy Jr. to strengthen protections for federal health workers after the Aug. 8 shooting at the Centers for Disease Control and Prevention’s Atlanta campus that left police officer David Rose dead. In a letter released Wednesday, the signatories—among them former CDC principal deputy director Anne Schuchat and nearly 400 current staff who mostly signed anonymously—urge the department to tighten emergency procedures, improve security alerts and remove online “watchlists” that expose personal information about employees. The group also calls on Kennedy to publicly disavow misinformation about vaccines and infectious diseases, arguing that hostile rhetoric has contributed to threats against public-health workers. Investigators say the gunman, who fired almost 200 rounds at six CDC buildings before killing himself, had writings expressing anger over COVID-19 vaccination. The CDC has shifted most personnel to remote work and increased on-site security since the attack. The letter, also sent to Congress and the White House, asks Kennedy for a formal response by Sept. 2. Kennedy, a longtime vaccine skeptic who dismissed the CDC’s vaccine advisory panel last year, has said only that “no one should face violence while working to protect the health of others.”