Beginning in the 1930s, the Public Health Service (PHS) contacted the Tuskegee Institute in order to do research on the effects of syphilis on the African American male population.
The study went on for 40 years and in that time, the participants were never told they had syphilis, but instead were told they had ‘bad blood’. The worst part of the experiment is that syphilis became curable in 1947 when they discovered penicillin cured syphilis. But the participants of the study were still never told, nor treated.
This resulted in the men giving syphilis to their wives and even to their own children.