A patient (R) suffers from the cholera epidemic and receives medical treatment at a health center in Sanaa, Yemen, on April 15, 2019. So far this year, 200,000 suspected cases of deadly cholera had been reported in Yemen, almost three times the same period last year, the UN Under-Secretary-General for Humanitarian Affairs and Emergency Relief Coordinator Mark Lowcock said on Monday. (Xinhua/Mohammed Mohammed)