Can Coronavirus Contact Tracing Survive Reopening?

ohn Welch, a nurse anesthetist with the nonprofit Partners in Health, was working at a clinic on the rural central plateau of Haiti when, in August of 2014, he got a call asking if he could fly to Liberia. The charity had just agreed to help in the fight against Ebola, which had cropped up in Guinea that winter and was now spreading rapidly across West Africa. Welch, who specializes in pediatric surgeries, would go on to play a vital role in the American response to the coronavirus, but in...