In order to reduce the burden of disease, we need to prevent people coming into contact with the bacteria, protozoa and parasites that cause disease. This means preventing the faeces from one person entering the digestive system of another person and preventing people from being preventing people from being preyed upon by mosquitoes and worms. There are three elements to this;

• Water: A safe water source is constructed to ensure a supply of water which is free from contamination. A protected source also removes the need to wade into water populated with worms, or mosquito habitats. This can be done in many different ways.
• Sanitation: A latrine must be constructed to contain the faeces. The community must understand the need to avoid open defecation and prevent water sources being contaminated.
• Hygiene: Hand washing facilities and hygiene education are vital to ensure that the safe water is collected, stored and consumed without risk of contamination during that process.