Researchers have discovered that the pathogen that causes cholera only becomes active at body temperature. They plan to prevent the bacteria becoming harmful.
Tens of millions of people across the world, mostly in rural areas, lack clean water, the charity WaterAid says. Mainly poor countries are affected, but some major economies also have a problem.
The World Health Organization says nearly two billion people on the planet do not have access to clear drinking water. The new report urges considerable increases in revenue to meet the growing demand for clean water.
Outgoing UN Secretary-General Ban Ki-moon apologized for the UN's role in the spread of cholera in Haiti. But Ban stopped short of asserting the UN bears responsibility for starting the outbreak.
Nearly 800 Haitians have contracted cholera two weeks after Hurricane Matthew hit the Carribean country. Relief efforts are not keeping up with demand.
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