A man carries water bottles during a cholera outbreak that has caused the death of individuals in Hammanskraal, South Africa, May 24, 2023. REUTERS/Ihsaan Haffejee 

Residents of Hammanskraal collect clean water and sanitary products distributed by South African disaster relief group, Gift of The Givers, after individuals died this week in Hammanskraal, South Africa May 24, 2023. REUTERS/Ihsaan Haffejee 

A view shows a shop selling purified water during a cholera outbreak that has caused the death of individuals in Hammanskraal, South Africa, May 24, 2023. REUTERS/Ihsaan Haffejee 

Residents fill up water bottles at a community filling station in the informal settlement of Kanana after individuals died from cholera in Hammanskraal, South Africa, May 24, 2023. REUTERS/Ihsaan Haffejee 

Residents of Hammanskraal collect clean water and sanitary products distributed by South African disaster relief group, Gift of The Givers, after individuals died this week in Hammanskraal, South Africa May 24, 2023. REUTERS/Ihsaan Haffejee 

Residents fill up water bottles at a community filling station in the informal settlement of Kanana after individuals died from cholera in Hammanskraal, South Africa, May 24, 2023. REUTERS/Ihsaan Haffejee 

Young residents carry water home after filling up a bottle at a community filling station in the informal settlement of Kanana after individuals died from cholera in Hammanskraal, South Africa, May 24, 2023. REUTERS/Ihsaan Haffejee TPX IMAGES OF THE DAY 

The entrance to Rooiwal Sewage Works, which is being investigated as a possible source of water contamination during a cholera outbreak that has caused the death of individuals, in Hammanskraal, South Africa, May 24, 2023. REUTERS/Ihsaan Haffejee 

The Temba Water Treatment Works which is being investigated as a possible source of water contamination during a cholera outbreak that has caused the death of individuals in Hammanskraal, South Africa, May 24, 2023. REUTERS/Ihsaan Haffejee 

Patient Abraham Mpitsheni (54) is seen after a visit by South African officials over the death of fifteen people during a Cholera outbreak at Jubilee District Hospital in Hammanskraal, South Africa May 22, 2023 REUTERS/Catherine Schenck. 

Patient Sello Samuel Lekoto (36), after a visit by South African officials over the death of fifteen people during a Cholera outbreak sits on a bed at Jubilee District Hospital in Hammanskraal, South Africa May 22, 2023 REUTERS/Catherine Schenck 

Deputy Ministers of Water Affairs, David Mahlobo and Health, Sibongiseni Dhlomo along with other officials brief the media over the death of fifteen people during a cholera outbreak at Jubilee District Hospital in Hammanskraal, South Africa May 22, 2023 REUTERS/Catherine Schenck. 

A medical worker stands at the entrance of the cholera ward at a clinic run by Doctors Without Borders in the Cite Soleil neighborhood days after Haiti police blocked streets and broke into the airport during a protest demanding justice for fellow police officers killed by armed gangs, in Port-au-Prince, Haiti February 3,2023. REUTERS/Ricardo Arduengo 

A medical personnel disinfects a colleague at the exit of the cholera ward at a clinic run by Doctors Without Borders in the Cite Soleil neighborhood days after Haiti police blocked streets and broke into the airport during a protest demanding justice for fellow police officers killed by armed gangs, in Port-au-Prince, Haiti February 3,2023. REUTERS/Ricardo Arduengo 

A medical worker walks through the cholera ward at a clinic run by Doctors Without Borders in the Cite Soleil neighborhood days after Haiti police blocked streets and broke into the airport during a protest demanding justice for fellow police officers killed by armed gangs, in Port-au-Prince, Haiti February 3,2023. REUTERS/Ricardo Arduengo 

Patients suffering cholera symptoms receive treatment at a clinic run by Doctors Without Borders in the Cite Soleil neighborhood days after Haiti police blocked streets and broke into the airport during a protest demanding justice for fellow police officers killed by armed gangs, in Port-au-Prince, Haiti February 3,2023. REUTERS/Ricardo Arduengo 

A patient suffering cholera symptoms receives treatment at a clinic run by Doctors Without Borders in the Cite Soleil neighborhood days after Haiti police blocked streets and broke into the airport during a protest demanding justice for fellow police officers killed by armed gangs, in Port-au-Prince, Haiti February 3,2023. REUTERS/Ricardo Arduengo 

A patient suffering cholera symptoms receives treatment at a clinic run by Doctors Without Borders in the Cite Soleil neighborhood days after Haiti police blocked streets and broke into the airport during a protest demanding justice for fellow police officers killed by armed gangs, in Port-au-Prince, Haiti, February 3,2023. REUTERS/Ricardo Arduengo 

A patient suffering cholera symptoms receives treatment at a clinic run by Doctors Without Borders in the Cite Soleil neighborhood days after Haiti police blocked streets and broke into the airport during a protest demanding justice for fellow police officers killed by armed gangs, in Port-au-Prince, Haiti February 3, 2023. REUTERS/Ricardo Arduengo 

A patient suffering cholera symptoms receives treatment at a clinic run by Doctors Without Borders in the Cite Soleil neighborhood days after Haiti police blocked streets and broke into the airport during a protest demanding justice for fellow police officers killed by armed gangs, in Port-au-Prince, Haiti, February 3,2023. REUTERS/Ricardo Arduengo 

Patients suffering cholera symptoms get treatment at a clinic run by Doctors Without Borders in the Cite Soleil neighborhood days after Haiti police blocked streets and broke into the airport during a protest demanding justice for fellow police officers killed by armed gangs, in Port-au-Prince, Haiti, February 3,2023. REUTERS/Ricardo Arduengo 

Dr. Marvin Ngao, the Medical Officer In-Charge of the International Rescue Committee (IRC), talks during an interview with Reuters at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 17, 2023. REUTERS/Thomas Mukoya 

Boys are pictured with their donkey loaded with firewood in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 17, 2023. REUTERS/Thomas Mukoya 

Somali refugees are seen outside their makeshift shelters in the new arrivals area at the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 17, 2023. REUTERS/Thomas Mukoya 

Boys are pictured with their donkey loaded with firewood in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 17, 2023. REUTERS/Thomas Mukoya 

A Somali refugee girl carries her sibling as they walk in their new arrivals area of the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 17, 2023. REUTERS/Thomas Mukoya 

Dr. Marvin Ngao, the Medical Officer In-Charge of the International Rescue Committee (IRC), treats a child inside the ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 17, 2023. REUTERS/Thomas Mukoya 

Dahir Suleiman Adanm 65, a Somali refugee, sits with his wife Hajiyow Arbow Noor, 55, and their children inside their makeshift shelter within the new arrivals area at the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 17, 2023. REUTERS/Thomas Mukoya 

Dahir Suleiman Adan, 65, a Somali refugee, stands outside his makeshift shelter in the new arrivals area at the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 17, 2023. REUTERS/Thomas Mukoya 

Somali refugees walk outside their makeshift shelters in the new arrivals area at the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 17, 2023. REUTERS/Thomas Mukoya 

Mumina Hussein Mohammed, 74, rests in the hospital bed while receiving cholera treatment inside the International Rescue Committee (IRC) female ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 17, 2023. REUTERS/Thomas Mukoya 

Somali refugees are seen through a discarded mosquito net as they gather in the new arrivals area of the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 17, 2023. REUTERS/Thomas Mukoya 

Somali refugee women carry their malnourished children at the International Rescue Committee (IRC) health Post L6, as they wait to be enrolled in the nutrition program in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 17, 2023. REUTERS/Thomas Mukoya 

Nadifo Hassan, 22, a Somali refugee, feeds her child Farihiyo Noor Hassan as he receives treatment for malnutrition inside the International Rescue Committee (IRC) stabilization ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 16, 2023. REUTERS/Thomas Mukoya 

Dool Abdirahman Ismael, 26, a Somali refugee, carries her child Hikimo Mohamed as he receives treatment for malnutrition inside the International Rescue Committee (IRC) stabilization ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 16, 2023. REUTERS/Thomas Mukoya 

Nadifo Hassan, 22, a Somali refugee, feeds her child Farihiyo Noor Hassan as he receives treatment for malnutrition inside the International Rescue Committee (IRC) stabilization ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 16, 2023. REUTERS/Thomas Mukoya 

Abdi Hassan Abdicadir, a malnourished 3-month-old Somali refugee, receives treatment inside the International Rescue Committee (IRC) stabilization ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 16, 2023. REUTERS/Thomas Mukoya 

Abdi Hassan Abdicadir, a malnourished 3-month-old Somali refugee, receives treatment inside the International Rescue Committee (IRC) stabilization ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 16, 2023. REUTERS/Thomas Mukoya 

Fardousa Abdi Hared, 20, a Somali refugee, feeds her malnourished 3-month-old child Abdi Hassan Abdicadir as he receives treatment inside the International Rescue Committee (IRC) stabilization ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 16, 2023. REUTERS/Thomas Mukoya 

A malnourished child receives nebulizer therapy inside the International Rescue Committee (IRC) stabilization ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 16, 2023. REUTERS/Thomas Mukoya 

Dool Abdirahman Ismael 26, a Somali refugee, carries her child Hikimo Mohamed as he receives treatment for malnutrition inside the International Rescue Committee (IRC) stabilization ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 16, 2023. REUTERS/Thomas Mukoya 

Abdi Hassan Abdicadir, a malnourished 3-month-old Somali refugee, receives treatment inside the International Rescue Committee (IRC) stabilization ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 16, 2023. REUTERS/Thomas Mukoya 

Abdi Hassan Abdicadir, a malnourished 3-month-old Somali refugee, receives treatment inside the International Rescue Committee (IRC) stabilization ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 16, 2023. REUTERS/Thomas Mukoya 

Dool Abdirahman Ismael, 26, a Somali refugee, carries her child Hikimo Mohamed as he receives treatment for malnutrition inside the International Rescue Committee (IRC) stabilization ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 16, 2023. REUTERS/Thomas Mukoya 

Fardousa Abdi Hared, 20, a Somali refugee, feeds her malnourished 3-month-old child Abdi Hassan Abdicadir as he receives treatment inside the International Rescue Committee (IRC) stabilization ward at the Hagadera Main Hospital in the Hagadera refugee camp in Dadaab, near the Kenya-Somalia border, in Garissa County, Kenya, January 16, 2023. REUTERS/Thomas Mukoya 

A health worker of Haiti's Ministry of Public Health and Population (MSPP) administers an oral cholera vaccine after cholera reemerged in the Caribbean island nation in early October, in Port-au-Prince, Haiti December 19, 2022. REUTERS/Ralph Tedy Erol 

Health workers of Haiti's Ministry of Public Health and Population (MSPP) hand out an oral cholera vaccine after cholera reemerged in the Caribbean island nation in early October, in Port-au-Prince, Haiti December 19, 2022. REUTERS/Ralph Tedy Erol 

Health workers of Haiti's Ministry of Public Health and Population (MSPP) administer an oral cholera vaccine after cholera reemerged in the Caribbean island nation in early October, in Port-au-Prince, Haiti December 19, 2022. REUTERS/Ralph Tedy Erol 

A man takes an oral cholera vaccine handed out by health workers of Haiti's Ministry of Public Health and Population (MSPP) after cholera reemerged in the Caribbean island nation in early October, in Port-au-Prince, Haiti December 19, 2022. REUTERS/Ralph Tedy Erol 

A man takes an oral cholera vaccine handed out by health workers of Haiti's Ministry of Public Health and Population (MSPP) after cholera reemerged in the Caribbean island nation in early October, in Port-au-Prince, Haiti December 19, 2022. REUTERS/Ralph Tedy Erol 

A woman takes an oral cholera vaccine handed out by health workers of Haiti's Ministry of Public Health and Population (MSPP) after cholera reemerged in the Caribbean island nation in early October, in Port-au-Prince, Haiti December 19, 2022. REUTERS/Ralph Tedy Erol 

A health worker of Haiti's Ministry of Public Health and Population (MSPP) holds a dose of an oral cholera vaccine after cholera reemerged in the Caribbean island nation in early October, in Port-au-Prince, Haiti December 19, 2022. REUTERS/Ralph Tedy Erol 

Health workers of Haiti's Ministry of Public Health and Population (MSPP) administer an oral cholera vaccine after cholera reemerged in the Caribbean island nation in early October, in Port-au-Prince, Haiti December 19, 2022. REUTERS/Ralph Tedy Erol 

A nurse prepares to administer serums to cholera patients at a new cholera treatment centre run by Medecins Sans Frontieres (MSF - Doctors without Borders) in Munigi in the outskirts of Goma in the North Kivu province of the Democratic Republic of Congo December 8, 2022. REUTERS/Arlette Bashizi 

Chrispin Balume, 8, receives cholera treatment at a new cholera treatment centre run by Medecins Sans Frontieres (MSF - Doctors without Borders) in Munigi in the outskirts of Goma in the North Kivu province of the Democratic Republic of Congo December 8, 2022. REUTERS/Arlette Bashizi 

Chrispin Balume, 8, receives cholera treatment at a new cholera treatment center run by Medecins Sans Frontieres (MSF - Doctors without Borders) in Munigi in the outskirts of Goma in the North Kivu province of the Democratic Republic of Congo December 8, 2022. REUTERS/Arlette Bashizi 

Namahigwe Christine, 30, looks after her children receiving cholera treatment at a new cholera treatment centre run by Medecins Sans Frontieres (MSF - Doctors without Borders) in Munigi in the outskirts of Goma in the North Kivu province of the Democratic Republic of Congo December 8, 2022. REUTERS/Arlette Bashizi 

Alain Bishikwabo Irenge, a doctor at the focal point of the Munigi health centre, checks in a tent with cholera patients set up by Medecins Sans Frontieres (MSF - Doctors without Borders) in Munigi in the outskirts of Goma in the North Kivu province of the Democratic Republic of Congo December 8, 2022. REUTERS/Arlette Bashizi 

A general view shows a section of the new cholera treatment centre run by Medecins Sans Frontieres (MSF - Doctors without Borders) in Munigi in the outskirts of Goma in the North Kivu province of the Democratic Republic of Congo December 8, 2022. REUTERS/Arlette Bashizi 

A hygienist worker walks after disinfecting at a treatment centre that receives people diagnosed with cholera from different camps for the internally displaced persons in Kanyaruchinya, at the new cholera health facility run by Medecins Sans Frontieres (MSF - Doctors without Borders) in Munigi, in the outskirts of Goma in the North Kivu province of the Democratic Republic of Congo December 8, 2022. REUTERS/Arlette Bashizi