A doctor administers a dose of the AstraZeneca vaccine against COVID-19 in Dippoldiswalde, Germany, on 15 March—the day the German government said it would temporarily halt the use of the vaccine because of safety concerns. Jens Schlueter/Getty Images By Gretchen Vogel, Kai KupferschmidtMar. 17, 2021 , 1:30 PM Science’s COVID-19 […]