In 1928, the Rosenwald Fund had worked with Public Health Services in a study of over 2,000 black workers in Mississippi's Delta Pine and Land Company. The study's goal was to see how common syphilis was in this group. The Rosenwald Fund helped provide treatment for 25% of the workers who had tested positive for syphilis. However, in 1929, the Stock Market Crash happened. The Great Depression also began. The Rosenwald Fund said they could no longer pay for medicine to treat the Tuskegee men.