Researchers have discovered that the pathogen that causes cholera only becomes active at body temperature. They plan to prevent the bacteria becoming harmful.
The war-torn country is experiencing the worst cholera epidemic the world has seen in a decade according to the Red Cross. Yet cholera is not the only problem Yemenis face, they also lack food, water, medicine and fuel.
The UN has called the war in Yemen the world's worst humanitarian crisis. Karl-Otto Zentel, general secretary of humanitarian agency CARE Germany-Luxemburg, describes the human suffering in this overlooked conflict.
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.
Time for the best pastime ever - it's Valentine's Day! Smooching burns calories and strengthens the immune system, but despite its health properties, it's not allowed in public all over the world.
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