11,000 Athletes, No Outbreak: How the Tokyo Olympics Dodged COVID

Before thousands of international athletes and reporters even landed in Tokyo, the Olympics were seen as a horror story waiting to happen.

What’s essential in a mega sporting event—confined spaces, crowds and close contacts—also makes fertile ground for COVID-19. Apprehensive and alarmed, the Japanese public overwhelmingly opposed hosting the Tokyo Games. When the time came, everyone bit their fingernails, bracing for headlines of a mass outbreak in the Olympic Village, or even worse, an Olympic variant.

But as some 11,000 Olympic athletes packed up after two weeks of competitions, organizers breathed a sigh of relief that their...