![A man wearing a mask receives a vaccination in the arm](/sites/default/files/media_2020/12/202010africa_southafrica_vaccine.jpg)
A man in Soweto, South Africa receives an injection as he participates in clinical trial for a Covid-19 vaccine in June 2020.
© 2020 Siphiwe Sibeko/Pool/ AFP via Getty Images
A man in Soweto, South Africa receives an injection as he participates in clinical trial for a Covid-19 vaccine in June 2020.