Regular testing to catch "silent" COVID-19 spread among students will be key to safely reopening colleges this fall, campus infection control experts say. Extensive modeling suggests that testing college students for COVID every two to three days using a low-cost, less accurate test would be the best strategy for campuses to safely reopen this fall, according to research led by David Paltiel, a professor of health policy at the Yale School of Public Health. "What really is concerning me are the many schools out there that are considering the option of not doing any testing, but of simply monitoring students for symptoms of COVID and using those signs and symptoms of illness to trigger testing, isolation, contact tracing and quarantine," Paltiel said.