How Did I Catch the Coronavirus?

September 15, 2020

(The New Yorker) – For the majority of the nearly five million COVID-19 cases across the United States, the point of infection is unknown. “We don’t know how their exposure occurred or what kind of environment they were in when it happened,” Crystal Watson, an expert on contact tracing at the Johns Hopkins Center for Health Security, told me. When an outbreak is under control, this would not be the case. Test-and-trace teams would track the percentage of cases that can be linked to another person—or, more specifically, the percentage of cases that were already on the health agency’s radar, as potentially exposed contacts.