The number of suspected cholera cases in Yemen has reached one million, the International Committee of the Red Cross (ICRC) says.
At least 2,226 people are believed to have died of the disease since April, although the number of new cases has declined for 14 consecutive weeks.
The ICRC said the outbreak was “amplifying the suffering of a country caught up in a brutal war”.
More than 80% of Yemenis lack food, fuel, water and access to healthcare.
The war between forces loyal to President Abdrabbuh Mansour Hadi, who is backed by a Saudi-led coalition, and the rebel Houthi movement has killed more than 8,670 people since March 2015.
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Cholera is an acute diarrhoeal infection caused by ingestion of food or water contaminated with the bacterium Vibrio cholera. In severe cases, the disease can kill within hours if left untreated.