The Statistical Secrets of Covid-19 Vaccines

THE CREATION AND distribution of vaccines against Covid-19 has been as close as science gets to a miracle—the culmination of centuries of infectious disease research, a mastery of viral genomics, the creation of a whole new kind of vaccinology, and speed in the face of crisis. So it’s weird that even as the global pandemic worsens (infection and death rates have gone vertical in India and South America), the appetite for vaccination in the United States seems to have peaked. The seven-day average number of doses hit 3.38 million on...