Virus Outbreak College Testing

A man decides to take the stairs as a sign advises riders that only one rider at a time is permitted on an elevator due to the COVID-19 virus outbreak, Thursday, July 23, 2020, at Boston University in Boston. Dozens of U.S. colleges are announcing plans to test students for the coronavirus this fall, but their strategies vary widely. Federal health officials discourage widespread testing on college campuses, but some researchers say it's necessary to prevent outbreaks. (AP Photo/Charles Krupa)