"Yemen is facing an unprecedented humanitarian crisis due to an ongoing international conflict that began in March 2015 and has killed over 10,000 people. More than half of Yemen's estimated 25 million population lack access to basic health care, and roughly 15 million people are without access to clean water, sanitation, and hygiene (WASH) services. Only 45% of health facilities in the country are functional, and many have limited access to medicines, medical equipment, and clean water and sanitation, further complicating efforts to control the outbreak. Yemen is experiencing the world's largest ongoing cholera outbreak. The outbreak began in October 2016, tapered off in December, and surged in April 2017 [...]. The World Health Organization (WHO) estimates that as of August 1, 2017, over 440,000 Yemenis have contracted cholera, of whom over 1,900 have died. Children younger than 15 years old and the elderly are particularly vulnerable, together accounting for roughly 80% of all cholera deaths."
CRS Insight, IN10729
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html