Question: which charities are most efficient?
Answer: Malaria Consortium. seasonal malaria chemoprevention program only. ... 
Against Malaria Foundation. ... 
Helen Keller International. ... 
Evidence Action's Deworm the World Initiative. ... 
SCI Foundation (Schistosomiasis Control Initiative) ... 
Sightsavers. ... 
END Fund. ... 
GiveDirectly.