Science and Medicine

Alfred Sommer

Alfred (Al) Sommer (born October 2, 1942) is an American ophthalmologist and epidemiologist at the Johns Hopkins Bloomberg School of Public Health. His research on vitamin A in the 1970s and 1980s revealed that dosing even mildly vitamin A deficient children with an inexpensive, large dose vitamin A capsule twice a year reduces child mortality by as much as 34 percent. The World Bank and the Copenhagen Consensus list vitamin A supplementation as one of the most cost-effective health interventions in the world.

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• ▸Environment and sexual orientation
• ▸Arctic Circle
• ▸Frans de Waal

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