A man wearing a t-shirt with the face of the late South African anti-apartheid activist Steve Biko, carries luggage as he walks to a taxi rank as residents of a number of African cities where the coronavirus is spreading are heading to the countryside to try to escape from the disease, in Johannesburg, South Africa, March 25, 2020. REUTERS/Siphiwe Sibeko

South African President Cyril Ramaphosa talks to former U.S. President Barack Obama at the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko TPX IMAGES OF THE DAY

President of South Africa gestures as he arrives for the 16th Nelson Mandela annual lecture, delivered by former U.S. President Barack Obama , marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

President of South Africa gestures as he arrives for the 16th Nelson Mandela annual lecture, delivered by former U.S. President Barack Obama, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

South Africa's businessman Patrice Motsepe gestures as he listens to the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko TPX IMAGES OF THE DAY

South African President Cyril Ramaphosa talks to former U.S. President Barack Obama at the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko TPX IMAGES OF THE DAY

Guests attend the 16th Nelson Mandela annual lecture delivered by former U.S. President Barack Obama, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Guests attend the 16th Nelson Mandela annual lecture delivered by former U.S. President Barack Obama, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

South African President Cyril Ramaphosa talks to former U.S. President Barack Obama at the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama waves after he delivered the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama chats to South Africa's businessman Patrice Motsepe after Obama delivered the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko/File Photo

Crowds listen as former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa, July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa, July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa, July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa, July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa, July 17, 2018. REUTERS/Siphiwe Sibeko

Crowds listen as former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa, July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama delivers the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

South African President Cyril Ramaphosa talks to former U.S. President Barack Obama at the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Accompanied by South African President Cyril Ramaphosa, former U.S. President Barack Obama arrives to deliver the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Accompanied by South African President Cyril Ramaphosa, former U.S. President Barack Obama arrives to deliver the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Former U.S. President Barack Obama arrives to deliver the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Human rights lawyer George Bizos arrives to hear Former U.S. President Barack Obama delivering the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

Zulu King Goodwill Zwelithini arrives to hear Former U.S. President Barack Obama delivering the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

A man holds a program as crowds gather to hear former U.S. President Barack Obama delivering the 16th Nelson Mandela annual lecture, marking the centenary of the anti-apartheid leader's birth, in Johannesburg, South Africa July 17, 2018. REUTERS/Siphiwe Sibeko

African National Congress Youth League members interrupt a memorial service for anti-apartheid activist Ahmed Kathrada in Durban, South Africa, April 9, 2017. REUTERS/Rogan Ward

African National Congress Youth League members interrupt a memorial service for anti-apartheid activist Ahmed Kathrada in Durban, South Africa, April 9, 2017. REUTERS/Rogan Ward

African National Congress Youth League members interrupt a memorial service for anti-apartheid activist Ahmed Kathrada in Durban, South Africa, April 9, 2017. REUTERS/Rogan Ward

Former Finance Minister Pravin Gordhan reacts as African National Congress Youth League members interrupt a memorial service for anti-apartheid activist Ahmed Kathrada in Durban, South Africa, April 9, 2017. REUTERS/Rogan Ward

Former Finance Minister Pravin Gordhan reacts as African National Congress Youth League members interrupt a memorial service for anti-apartheid activist Ahmed Kathrada in Durban, South Africa, April 9, 2017. REUTERS/Rogan Ward

African National Youth League members interrupt a memorial service for anti-apartheid activist Ahmed Kathrada in Durban, South Africa, April 9, 2017. REUTERS/Rogan Ward

Former South African Finance Minister Pravin Gordhan addresses a memorial service for anti-apartheid veteran Ahmed Kathrada in Cape Town, South Africa April 6, 2017. REUTERS/Sumaya Hisham

Former South African Finance Minister Pravin Gordhan addresses a memorial service for anti-apartheid veteran Ahmed Kathrada in Cape Town, South Africa April 6, 2017. REUTERS/Sumaya Hisham

Former South African Finance Minister Pravin Gordhan addresses a memorial service for anti-apartheid veteran Ahmed Kathrada in Cape Town, South Africa April 6, 2017. REUTERS/Sumaya Hisham

Former South African Finance Minister Pravin Gordhan addresses a memorial service for anti-apartheid veteran Ahmed Kathrada in Cape Town, South Africa April 6, 2017. REUTERS/Sumaya Hisham

A worker walks past posters bearing the face of Veteran South African anti-apartheid activist Ahmed Kathrada, who was sentenced to life imprisonment alongside Nelson Mandela, ahead of his funeral at the Westpark Cemetery in Johannesburg, South Africa March 29, 2017. REUTERS/Siphiwe Sibeko

Veteran South African anti-apartheid activist Ahmed Kathrada (center, R) arrives with Andrew Mlangeni (center, L) for the ANC's centenary celebration in Bloemfontein, South Africa, January 8, 2012. Picture taken January 8, 2012. REUTERS/Siphiwe Sibeko

Veteran South African anti-apartheid activist Ahmed Kathrada (L) and former president of South Africa Thabo Mbeki carry the Centenary torch during the ANC's centenary celebration in Bloemfontein, South Africa January 8, 2012. Picture taken January 8, 2012. REUTERS/Siphiwe Sibeko

Veteran South African anti-apartheid activist Ahmed Kathrada looks on during the ANC's centenary celebration in Bloemfontein, South Africa, January 8, 2012. Picture taken January 8, 2012. REUTERS/Siphiwe Sibeko

Veteran South African anti-apartheid activist Ahmed Kathrada looks on during the ANC's centenary celebration in Bloemfontein, South Africa, January 8, 2012. Picture taken January 8, 2012. REUTERS/Siphiwe Sibeko

FIFA presidential candidate Gianni Infantino addresses a news conference in Cape Town, February 22, 2016. Infantino is confident of taking more than half the votes from Africa in Friday's election, despite the continent's governing body endorsing his major rival Sheik Salman of Bahrain. Infantino made a fleeting visit to South Africa on Monday to visit Robben Island at the invitation of rival Tokyo Sexwale who spent 13 years incarcerated on the island as an anti-Apartheid prisoner. REUTERS/Mike Hutchings

FIFA presidential candidate Tokyo Sexwale addresses a news conference with rival candidate Gianni Infantino (not pictured) in Cape Town, February 22, 2016. Infantino made a fleeting visit to South Africa on Monday to visit Robben Island at the invitation of Sexwale who spent 13 years incarcerated on the island as an anti-Apartheid prisoner. REUTERS/Mike Hutchings

FIFA presidential candidate Gianni Infantino (R) jokes with rival Tokyo Sexwale at a news conference in Cape Town, February 22, 2016. Infantino is confident of taking more than half the votes from Africa in Friday's election, despite the continent's governing body endorsing his major rival Sheik Salman of Bahrain. Infantino made a fleeting visit to South Africa on Monday to visit Robben Island at the invitation of Sexwale who spent 13 years incarcerated on the island as an anti-Apartheid prisoner. REUTERS/Mike Hutchings

FIFA presidential candidate Gianni Infantino addresses a news conference in Cape Town, February 22, 2016. Infantino is confident of taking more than half the votes from Africa in Friday's election, despite the continent's governing body endorsing his major rival Sheik Salman of Bahrain. Infantino made a fleeting visit to South Africa on Monday to visit Robben Island at the invitation of rival Tokyo Sexwale who spent 13 years incarcerated on the island as an anti-Apartheid prisoner. REUTERS/Mike Hutchings TPX IMAGES OF THE DAY

A member of South Africa's left-wing Economic Freedom Fighters (EFF) gestures outside the Johannesburg Stock Exchange (JSE) in Sandton, October 27, 2015. Thousands of South Africa's Economic Freedom Fighters (EFF) protested outside the Johannesburg stock exchange on Tuesday in pursuit of working class votes for the radical leftist party ahead of municipal elections next year.The EFF, led by firebrand Julius Malema, is looking to use the momentum built from student demonstrations last week to increase the pressure on President Jacob Zuma's African National Congress (ANC), the anti-apartheid party of Nelson Mandela. REUTERS/Siphiwe Sibeko

Security guards stand outside the Johannesburg Stock Exchange (JSE) in Sandton, October 27, 2015. Thousands of South Africa's Economic Freedom Fighters (EFF) protested outside the Johannesburg stock exchange on Tuesday in pursuit of working class votes for the radical leftist party ahead of municipal elections next year.The EFF, led by firebrand Julius Malema, is looking to use the momentum built from student demonstrations last week to increase the pressure on President Jacob Zuma's African National Congress (ANC), the anti-apartheid party of Nelson Mandela. REUTERS/Siphiwe Sibeko

A security guard stands outside the Johannesburg Stock Exchange (JSE) in Sandton, October 27, 2015. Thousands of South Africa's Economic Freedom Fighters (EFF) protested outside the Johannesburg stock exchange on Tuesday in pursuit of working class votes for the radical leftist party ahead of municipal elections next year.The EFF, led by firebrand Julius Malema, is looking to use the momentum built from student demonstrations last week to increase the pressure on President Jacob Zuma's African National Congress (ANC), the anti-apartheid party of Nelson Mandela. REUTERS/Siphiwe Sibeko

Leader of South Africa's left-wing Economic Freedom Fighters (EFF) Julius Malema gestures after arriving at the Johannesburg Stock Exchange (JSE) in Sandton, October 27, 2015. Thousands of South Africa's Economic Freedom Fighters (EFF) protested outside the Johannesburg stock exchange on Tuesday in pursuit of working class votes for the radical leftist party ahead of municipal elections next year.The EFF, led by firebrand Julius Malema, is looking to use the momentum built from student demonstrations last week to increase the pressure on President Jacob Zuma's African National Congress (ANC), the anti-apartheid party of Nelson Mandela. REUTERS/Siphiwe Sibeko

Leader of South Africa's left-wing Economic Freedom Fighters (EFF) Julius Malema (C) looks on after arriving at the Johannesburg Stock Exchange (JSE) in Sandton, October 27, 2015. Thousands of South Africa's Economic Freedom Fighters (EFF) protested outside the Johannesburg stock exchange on Tuesday in pursuit of working class votes for the radical leftist party ahead of municipal elections next year.The EFF, led by firebrand Julius Malema, is looking to use the momentum built from student demonstrations last week to increase the pressure on President Jacob Zuma's African National Congress (ANC), the anti-apartheid party of Nelson Mandela. REUTERS/Siphiwe Sibeko

South Africa's left-wing Economic Freedom Fighters (EFF) carry a portrait of their leader, Julius Malema during their march in Sandton, October 27, 2015. Thousands of South Africa's Economic Freedom Fighters (EFF) protested outside the Johannesburg stock exchange on Tuesday in pursuit of working class votes for the radical leftist party ahead of municipal elections next year.The EFF, led by firebrand Julius Malema, is looking to use the momentum built from student demonstrations last week to increase the pressure on President Jacob Zuma's African National Congress (ANC), the anti-apartheid party of Nelson Mandela. REUTERS/Siphiwe Sibeko TPX IMAGES OF THE DAY

Zakhele Ntsele (R) cooks in a communal kitchen at Jeppestown men's hostel in Johannesburg May 19, 2015. Grim, mainly single-sex dormitory blocks dotted round South Africa's main cities, the hostels are one of the lesser-known legacies of apartheid and the migrant labour system enforced on blacks by the white minority rule that ended two decades ago. Associated with Dickensian poverty, crime and, in many cases, Zulu tribalism - they played a major role in the wave of anti-foreigner violence last month in which at least seven people were killed. Picture taken May 19, 2015. REUTERS/Siphiwe Sibeko