Hygiene promotion is the most cost effective health intervention according to the World Bank.
(Saving lives, WaterAid, 2012)
Hygienic practices such as washing hands with soap can reduce the risk of diarrhoea by 50%
(Curtis and Cairncross, 2003; Luby, et al. 2005)
For every $1 invested in water and sanitation, an average of at least $4 is returned in increased productivity.
(Hutton, Global costs and benefits of drinking-water supply and sanitation interventions to reach the MDG target and universal coverage, WHO, Geneva, 2012: page 4)
Around 315,000 children under-five die every day from diarrhoeal diseases caused by dirty water and poor sanitation. That's 900 children per day, or one child every two minutes.
Diarrhoea is the third biggest killer of children under five years old in Sub-Saharan Africa.
(Child Health Epidemiology Reference Group (CHERG) 2012)
Every year, around 60 million children are born into homes without access to sanitation.
(UNICEF, 2006 - Progress for Children)