![A volunteer receives a Covid-19 test vaccine injection developed at the University of Oxford in Britain, during a clinical trial at the Chris Hani Baragwanath hospital in Soweto, Johannesburg, South Africa.](/sites/default/files/media_2021/03/202103bhr_southafrica_clinicaltrial.jpg)
A volunteer receives a Covid-19 test vaccine injection developed at the University of Oxford in Britain, during a clinical trial at the Chris Hani Baragwanath hospital in Soweto, Johannesburg, South Africa.
© 2020 Siphiwe Sibeko/AP Photo
A volunteer receives a Covid-19 test vaccine injection developed at the University of Oxford in Britain, during a clinical trial at the Chris Hani Baragwanath hospital in Soweto, Johannesburg, South Africa.