Lawrence Washington, left, is tested for covid-19 in a shopping center in Richmond on April 28. (John McDonnell/The Washington Post)

Nancy Gibbs is the director of the Shorenstein Center on Media, Politics and Public Policy at Harvard’s Kennedy School of Government.

Sooner or later, there will be tests. Temperature checks at every school, store and workplace; nasal swabs; antibody tests; virus-detecting dogs; new tests we haven’t invented yet — and then one more test, the most pervasive and unsettling one of all.