John Charles Cutler was a senior surgeon, and the acting chief of the venereal disease program in the United States Public Health Service. He is known for leading several controversial and unethical human experiments of syphilis, done under the auspices of the Public Health Service. He willfully spread syphilis and gonorrhea to unwitting patients including soldiers, prisoners, adults with leprosy, mental patients and orphan children as young as nine in the Guatemala syphilis experiments. He also conducted the Tuskegee syphilis experiments, in which African American men, not informed of the nature of the experiment, were deliberately infected with syphilis.

The United States Public Health Service is a collection of agencies of the Department of Health and Human Services concerned with public health, containing nine out of the department's twelve operating divisions. The Assistant Secretary for Health oversees the PHS. The Public Health Service Commissioned Corps (PHSCC) is the federal uniformed service of the PHS, and is one of the eight uniformed services of the United States.