Imagine the early days of the next pandemic, with public health and the media fomenting fear of a new pathogen. The impetus to close schools, businesses, churches, beaches, and parks will be irresistible, though the pitch will be “130 days until the vax” rather than “two weeks to flatten the curve.” When the vaccine finally arrives, the push to mass vaccinate for herd immunity will be enormous, even without evidence from the rushed trials that the vaccine provides long-lasting protection against disease transmission.