Russia is vaccinating health care workers, including this medic in Tver, with an experimental COVID-19 vaccine even though its efficacy isn’t yet clear to outsiders. REUTERS/Tatyana Makeyeva By Jon CohenNov. 11, 2020 , 7:05 PM Science’s COVID-19 reporting is supported by the Pulitzer Center and the Heising-Simons Foundation. Another day, […]