FILE - In this photo from files taken on Wednesday, July. 12, 2017, people fill buckets with water from a well that is alleged to be contaminated water with the bacterium Vibrio cholera, on the outskirts of Sanaa, Yemen. The World Health Organization's emergencies chief, Dr. David Salama, said Tuesday, Oct. 3, 2017 that the agency could have acted faster and sent more vaccines to fight a massive, deadly surge of cholera cases in war-battered Yemen this year. (AP Photo/Hani Mohammed, File)
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