What’s behind the dip in coronavirus cases? We ask specialists Vaccinations could be helping slow COVID-19 transmission among one population, said Samuel Scarpino, a Northeastern University epidemiologist. Long-term-care facilities, where residents and workers have begun to be vaccinated, have been tied to a reduced number of COVID-19 clusters in recent weeks, based on state data analyzed by Scarpino and postdoctoral researcher Brennan Klein, both of […]