Elderly people wearing protective masks line up to be registered to receive their first dose of the Pfizer COVID-19 vaccine at a vaccination centre in Chris Hani Baragwanath Academic Hospital, in Soweto, South Africa, Monday, May 17, 2021. South Africa has started its mass vaccination drive with the goal of inoculating nearly 5 million citizens aged 60 and above by the end of June. (AP Photo/Themba Hadebe)

Anglican Archbishop Emeritus, Desmond Tutu is photographed after receiving a shot of the COVID-19 vaccine, at the Brooklyn Chest Hospital in Cape Town, South Africa, Monday, May 17, 2021. South Africa has started its mass vaccination drive with the goal of inoculating nearly 5 million citizens aged 60 and above by the end of June. (AP Photo/Nardus Engelbrecht)

Thoko Hlongwane, receives the first dose of Pfizer COVID-19 vaccine from a health staff member during a vaccination day at a vaccination centre at Chris Hani Baragwanath Academic Hospital in Soweto, South Africa, Monday, May 17, 2021. South Africa has started its mass vaccination drive with the goal of inoculating nearly 5 million citizens aged 60 and above by the end of June. (AP Photo/Themba Hadebe)