A shooting outside the Centers for Disease Control and Prevention’s Atlanta headquarters on Friday left a police officer dead and officials and scientists at the nation’s premier public health agency shaken. Many are now demanding answers from their health secretary, Robert F. Kennedy Jr., who has long vilified the CDC and contributed to a culture of misinformation that they say makes them targets. Citing a senior law enforcement official, The New York Times reported the shooter, identified as 30-year-old Patrick Joseph White, was fixated on the Covid vaccine, which he blamed for his health problems. In response to the shooting...