A nurse dons a face mask at Houston Methodist Hospital on 4 July 2020. Erin Schaff/The New York Times/Redux By Kelly Servick, Jennifer Couzin-Frankel, Catherine MatacicMar. 16, 2021 , 4:37 PM Science’s COVID-19 reporting is supported by the Heising-Simons Foundation. Ready or not, the patients were coming. This time last […]