A victim of the Tuskegee syphilis experiment has his blood drawn by Dr. John Charles Cutler. c. 1953 © Image Credit: Wikimedia Commons

Syphilis in Tuskegee and Guatemala: The cruelest human experiments in history

This is the story of an American medical research project that lasted from 1946 to 1948 and is known for its unethical experimentation on vulnerable human populations in Guatemala. Scientists who infected Guatemalans with syphilis and gonorrhoea as part of the study knew very well they were violating ethical rules.