Helen Keller International (HKI) is a nonprofit organization focused on preventing blindness and reducing malnutrition.


HKI carries out over 120 programs in 21 countries around the world, including cataract surgery, vision correction, screening and treatment for diabetic retinopathy, distribution of treatments and cures for neglected tropical diseases, maternal and child nutrition education, and community-based management of acute malnutrition .[1] Charity evaluators within the effective altruism community have largely focused on HKI's vitamin A supplementation (VAS) program, which distributes vitamin A supplements in sub-Saharan Africa.


As of December 2021, GiveWell estimates that HKI can deliver a vitamin A supplement at a cost of about $1, and that a donation to HKI's VAS program has an average cost-effectiveness of $3,000 per life saved.[2][3][4] (The cost of distributing vitamin supplements is much lower than the cost of saving a life because a small fraction of people who receive supplementation would otherwise have died from conditions related to vitamin deficiency, and because of other factors.)[5]...

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