By Reuters Staff2 Min ReadHARARE( Reuters)-Zimbabwe received 2 million COVID-19 vaccines from China’s Sinovac on Thursday, its single largest shipment that it hopes will boost a vaccination campaign that had been slowed by shortages while infections and deaths rise. FILE PHOTO: A nurse vaccinates a health worker against the coronavirus disease( COVID-19), in Harare, Zimbabwe, February 18, 2021.... REUTERS/ Philimon Bulawayo The southern African nation imposed a dusk to dawn curfew and curbed th