Yemeni doctor Mohammed Abdul-Mughni, who died two weeks later, talks to a patient at a cholera treatment centre in Sanaa, Yemen March 10, 2019 in this still image taken from a video on April 1, 2019. Yemeni doctor Mohammed Abdul-Mughni described the surge in cholera cases he was treating as "disastrous" in a country battered by years of war and short of medical staff. Two weeks later cholera killed him too. REUTERS TV via REUTERS

Yemeni doctor Mohammed Abdul-Mughni, who died of cholera two weeks later, gives an interview at a cholera treatment centre in Sanaa, Yemen March 10, 2019 in this still image taken from a video on April 1, 2019. Yemeni doctor Mohammed Abdul-Mughni described the surge in cholera cases he was treating as "disastrous" in a country battered by years of war and short of medical staff. Two weeks later cholera killed him too. REUTERS TV via REUTERS

A worker sprays pesticides inside a tent where patients receive medical care at a cholera treatment center in Sanaa, Yemen March 10, 2019. Picture taken March 10, 2019. Yemen is suffering its third major outbreak of the water-borne bacterial infection since the conflict broke out in 2015, causing the world's most urgent humanitarian crisis that has put 10 million people on the brink of famine. REUTERS/Khaled Abdullah

A woman looks from outside a tent where patients receive medical care at a cholera treatment center in Sanaa, Yemen March 10, 2019. Picture taken March 10, 2019. The disease is spreading like "wild-fire", according to the United Nations which recorded 110,000 suspected cholera cases and 200 deaths in three months. REUTERS/Khaled Abdullah

People carry a woman on a stretcher at a cholera treatment center in Sanaa, Yemen March 10, 2019. Picture taken March 10, 2019. Abdul-Mughni had been working in a temporary diarrhoea treatment centre in the grounds of a hospital in Sanaa where around 120-150 severe cases arrive every day. REUTERS/Khaled Abdullah

Workers spray pesticides during an anti-cholera campaign in Sanaa, Yemen March 21, 2019. Picture taken March 21, 2019. "We are taking in patients around the clock, constantly ... Cholera is spreading widely now," said Ismail Mansoury, a doctor who worked alongside him. "In the past two weeks we have admitted around 1,100 confirmed cholera cases." REUTERS/Mohamed al-Sayaghi