1915: Joseph Goldberger, MD, pellegra

Joseph Goldberger, MD, under orders of the US Public Health Office induces Pellagra, a debilitating fatal disease affecting the central nervous system, in twelve Mississippi inmates in an attempt to discover treatments for the disease. He determined that the disease was caused by niacin (Vitamin B3) deficiency. But the Public Health Office fails to publicize the results until 1935, after millions of poor, mostly black people died of the disease. In 1935, the director of the US PHO finally acts by disclosing the easily prevented cause of the disease. (U.S. Slave, 2012)