A week ago, on Aug. 8, a gunman attacked the CDC headquarters in Atlanta, firing nearly 500 rounds, breaking about 150 windows, and killing a police officer. The shooter had reportedly become fixated on his belief that the Covid-19 vaccine had made him and others sick, and wanted to make “the public aware of his discontent,” according to the Georgia Bureau of Investigation. Were it not for the blast-reinforced glass, campus security, and a considerable amount of luck, Aug. 8 would almost certainly have been the deadliest attack against health workers in world history. The vast majority of Americans who...