For 40 years, the U.S. government watched 399 Black men die of syphilis without treating them — even after penicillin was available — just to see what the disease would do.
In 1932, the U.S. Public Health Service launched a study in Macon County, Alabama, enrolling 399 Black men who had syphilis and 201 without the disease. The men — mostly poor sharecroppers — were told they were being treated for 'bad blood,' a local term for a range of ailments. They were not told they had syphilis, and they were not given treatment. The study was designed to observe the natural progression of untreated syphilis in Black men, from infection to death.
By 1947, penicillin had become the standard, highly effective treatment for syphilis. The researchers knew this. They chose not to tell the study participants, and they actively worked to prevent the men from receiving the drug elsewhere — including blocking them from draft board screenings that would have identified their condition and entitled them to treatment. The study continued for another 25 years after a cure was widely available.
Inside the government, concerns were raised as early as the 1960s. A Public Health Service investigator named Peter Buxton wrote internal memos objecting to the study on ethical grounds and was rebuffed each time. Officials decided the study should continue until all participants had died so autopsies could be performed. Buxton eventually leaked the documents to a journalist. The story broke in July 1972 and caused a national scandal.
By the time the study was ended in 1972, 28 men had died directly of syphilis, at least 100 had died of related complications, 40 wives had been infected, and 19 children had been born with congenital syphilis. The men had been deceived, denied treatment, and monitored for four decades by the institution that was supposed to protect public health.
Congressional hearings followed, and in 1974, survivors and their families received a $10 million settlement. New federal regulations were put in place requiring informed consent for medical research — requirements that now govern every clinical trial in the United States. In 1997, President Clinton issued a formal apology at the White House, telling survivors: 'What was done cannot be undone. But we can end the silence.'
The Tuskegee study's legacy extends far beyond its victims. Research has shown that the 1972 revelations caused a measurable drop in Black Americans' trust in the medical system — a decline that persisted for decades and contributed to disparities in medical participation and health outcomes. The study is now a foundational case in bioethics and a sobering demonstration of how easily institutional racism can be institutionalized as science.