diarrhoea

Those that affect the digestive system can cause diarrhoea and stomach pains, and, according to the health service, what causes them is "not fully understood".

Even boiled "it causes diarrhoea and abdominal pain", says one woman, Nyakal.

Clothes go unwashed and families can’t bathe their children properly, meaning skin diseases and diarrhoea are widespread.

Symptoms include severe and sometimes bloody diarrhoea, stomach cramps, vomiting and fever.

The most common side-effects include feeling sick, vomiting, bloating, constipation and diarrhoea.