Many diseases such as diarrhoea, cholera, dysentery, typhoid, and hepatitis A are transmitted through water contaminated by human waste. 

 

Drinking unsafe (contaminated) water can cause severe illness and even death. 

The immature immune systems and small bodies of young children cannot easily cope with the detrimental effects like dehydration, fever and malnutrition of diarrhoeal diseases. 

Children under five are therefore more vulnerable than any other age group to the ill effects of unsafe water, poor sanitation and poor hygiene practice, particularly lack of proper handwashing.