The Tuskegee Syphilis Study: Forty Years of Untreated Disease in Macon County.

What the Tuskegee Study was, in a paragraph.

Beginning in October 1932, the U.S. Public Health Service's Division of Venereal Diseases enrolled 600 Black men in Macon County, Alabama — 399 with latent syphilis and 201 syphilis-negative controls — in a long-term observational study formally titled the "Tuskegee Study of Untreated Syphilis in the Negro Male." The men, mostly poor sharecroppers and tenant farmers, were recruited through the Tuskegee Institute and county health offices and were told they were being treated for "bad blood," a regional folk term covering syphilis, anemia, and general malaise. They were not told they had syphilis. They were given placebos, ineffective treatments (mercurial ointments and bismuth at doses below the era's therapeutic standard), free meals on examination days, free transportation to clinics, a small payment of $50 toward burial expenses, and the participation of a trusted local Public Health Service nurse, Eunice Rivers, whose forty-year continuity bound the cohort to the program. The stated scientific objective was to characterize the long-term natural history of untreated syphilis — cardiovascular damage, neurological deterioration, mortality — in a Black population, building on the earlier Oslo Study of similar character in Norwegian patients. The study had no termination date. It had no protocol for ending it when effective treatment became available. When penicillin was established as the curative therapy for syphilis between 1943 and 1947 and was rolled out as standard of care through the postwar national venereal disease control program, the Tuskegee subjects were excluded from treatment by the explicit decision of the study's successive directors. Several were prevented from receiving penicillin elsewhere through coordination with local physicians and the Macon County draft board. The study was exposed by Peter Buxtun, a PHS venereal-disease interviewer who had repeatedly raised internal objections from 1966 onward; his disclosure to Associated Press reporter Jean Heller produced a front-page story on July 25, 1972, and led to the program's termination in November 1972, the HEW Ad Hoc Advisory Panel's April 1973 report, a 1974 class-action settlement of $10 million establishing the Tuskegee Health Benefit Program, the 1979 Belmont Report establishing modern federal rules for human-subjects research, and a formal apology delivered by President Clinton at the White House on May 16, 1997, to five surviving participants.

The documented record.

Origins: the Rosenwald Fund and the 1929–1931 syphilis survey

The Tuskegee Study did not begin as a study of untreated syphilis. Verified Its immediate predecessor was a 1929 Public Health Service syphilis-control demonstration project funded by the Julius Rosenwald Fund and conducted in six high-prevalence Southern counties, including Macon County, Alabama. The Macon County prevalence rate measured during that survey — approximately 35 percent of the adult Black male population testing positive on Wassermann or Kahn serology — was among the highest documented in the United States. The original Rosenwald project had a treatment component; the Depression-driven withdrawal of Rosenwald funding in 1931 left the PHS with a documented high-prevalence population, an established field operation, and no money to treat it. The Tuskegee Study, conceived in summer 1932 under Dr. Taliaferro Clark, then head of the PHS Venereal Disease Division, was the institutional response to that combination [1][2].

The successive directors

The Tuskegee Study had four successive PHS directors over its forty-year life. Verified Dr. Taliaferro Clark conceived and launched the study in 1932; he retired in 1933, having authorized what was originally framed as a six-to-twelve-month observational study. His successor, Dr. Raymond Vonderlehr, was the field officer in Macon County during the first year and made the decision in 1933 to extend the study indefinitely; Vonderlehr's correspondence from that period is the documentary basis for the indefinite-extension decision. Dr. John Heller directed the PHS Venereal Disease Division from 1943 to 1948 and made the decisions, in coordination with Vonderlehr and later directors, that withheld penicillin treatment from the cohort during the period of penicillin's establishment as standard care. Dr. John Cutler, later notorious for the Guatemala syphilis experiments (1946–1948), participated in the Tuskegee Study from the 1940s and continued involvement into the 1960s; his contemporaneous papers, recovered from the University of Pittsburgh archives in 2003, document the continued institutional commitment to the original observational design through the postwar period [1][3].

Nurse Eunice Rivers

The continuity figure of the Tuskegee Study was Eunice Rivers, a Black Public Health Service nurse and Tuskegee Institute graduate who joined the study in 1932 and remained with it until its termination in 1972. Verified Rivers was the only staff member to remain with the program for its full forty years; she was the day-to-day point of contact between the men and the federal government, drove them to clinics, sat with them through examinations, attended their funerals, and is identified in nearly all surviving subject correspondence as the person they trusted. The historiography on Rivers is complex. Her own 1953 article in Public Health Reports ("Twenty Years of Followup Experience in a Long-Range Medical Study," co-authored with Stanley Schuman, Sidney Olansky, and Vonderlehr) describes her role in maintaining cohort retention; later interviews indicate she viewed the men as receiving valuable medical attention they could not otherwise access [3][4]. The HEW Ad Hoc Advisory Panel of 1973 declined to assign personal blame to Rivers, attributing institutional responsibility to the PHS chain of command instead.

What the subjects were told

The men enrolled in 1932 and 1933 were told they were being treated for "bad blood." Verified Surviving recruitment letters, recovered from the National Archives' PHS records, refer to the study only as "Macon County Health Department" outreach and to the procedures only by their physical character ("examination," "spinal puncture," "blood tests"). The 1933 letter inviting subjects to a particular round of spinal puncture — the lumbar punctures were diagnostic for neurosyphilis but presented to the subjects as part of the treatment for "bad blood" — was headed "Last Chance for Special Free Treatment" [1][5]. No surviving document indicates that any subject was ever given an explanation of his disease, of the syphilitic infection, of the study's actual objective, or of the existence of effective treatment after 1947. The HEW Panel found in 1973 that no informed consent of any modern definition had ever existed for any subject in the cohort.

Penicillin and the 1947 decision

Penicillin's effectiveness against syphilis was first demonstrated by Dr. John Mahoney of the PHS Venereal Disease Research Laboratory at Staten Island in 1943. Verified By 1947, penicillin was the federally-recommended standard of care, and the U.S. Public Health Service had established Rapid Treatment Centers across the South delivering the curative penicillin protocol on a free or low-cost basis to syphilitic patients. The Tuskegee subjects, by the explicit decision of the study's directors, were excluded from this treatment. Internal PHS memoranda from 1947 and 1952, recovered through congressional investigation and FOIA action in the 1970s, document the decision to maintain the cohort in its untreated state in order to preserve the scientific value of the long-term observation [3][5]. A 1969 internal CDC review (the program had moved to CDC authority in 1957) reached the same conclusion, citing the loss of scientific data that would result from treating the cohort.

The local-physician coordination and the draft board

The study's directors took active steps to prevent the cohort from receiving syphilis treatment from other sources. Verified The PHS coordinated with local physicians in Macon County and surrounding counties, sharing a list of subjects and asking that any of them who presented for treatment be referred back to the study rather than treated. During World War II, the Macon County draft board cooperated with the PHS to exempt 256 study subjects from the standard military physical-examination requirement for syphilis treatment, on the explicit basis that the men were participants in a federal medical study; the cooperation has been confirmed both in the surviving PHS files and in the 1973 HEW Panel's interviews with the draft board's remaining records [3][5]. Verified

The 1965–1969 internal challenges

The study's continuation was internally challenged within the PHS more than once. In 1965, Irwin Schatz, a Chicago cardiologist, wrote to the study's authors after reading their 1964 publication in Archives of Internal Medicine, asking how the withholding of penicillin was justified. Verified Schatz's letter received no formal reply. In 1966, Peter Buxtun, a PHS venereal-disease interviewer in San Francisco, raised the question of the study's ethics in writing to the CDC's Venereal Disease Branch; he repeated his objections in 1968. The 1969 internal CDC blue-ribbon panel convened in response to Buxtun's complaints — chaired by Dr. James Lucas and including representatives of the National Medical Association — voted to continue the study, citing the irreplaceable scientific value of the cohort [3][6].

The Buxtun-Heller disclosure: July 25, 1972

Peter Buxtun, having failed to produce internal change through proper channels, in late 1971 turned over his documentation to Edith Lederer, an Associated Press reporter, who passed it to her colleague Jean Heller. Verified Heller's investigation, working with the surviving documentary base and with PHS officials willing to speak, produced the story published on the AP wire on July 25, 1972, and run on the front page of The Washington Star the same evening under the headline "Syphilis Victims in U.S. Study Went Untreated for 40 Years." The story ran in The New York Times the following morning. The federal response was immediate: HEW Secretary Elliot Richardson on July 28, 1972, instructed Assistant Secretary for Health Merlin DuVal to convene an investigation, and the Ad Hoc Advisory Panel was convened in August 1972 under the chairmanship of Dr. Broadus Butler of the National Council on Aging [7][8].

The HEW Ad Hoc Advisory Panel report: April 1973

The HEW Ad Hoc Advisory Panel issued its final report on April 28, 1973. Verified The panel's findings were structured in four categories. First, the study had not been ethically justified at any point in its forty-year history. Second, the withholding of penicillin treatment after 1947 was an explicit moral failure for which the Public Health Service was institutionally responsible. Third, the subjects had not been given informed consent in any form recognizable under contemporary medical-research standards. Fourth, the federal regulatory framework for human-subjects research was inadequate, and a system of institutional review boards and codified informed-consent requirements should be established. The panel recommended termination of the study (which had occurred administratively in November 1972, before the report's release), the provision of lifetime medical care for surviving subjects and their families, the payment of cash compensation, and the establishment of the modern federal human-subjects research framework [8][9].

The 1975 settlement and the Tuskegee Health Benefit Program

A class-action suit, Pollard v. United States, was filed in 1973 by attorney Fred Gray on behalf of the surviving subjects and the families of the deceased. Verified The settlement, reached in December 1974 and approved by the U.S. District Court for the Middle District of Alabama in early 1975, provided $10 million ($37,500 to each living subject in the syphilitic group, $16,000 to the heirs of each deceased syphilitic subject, $16,000 to each living control subject, and $5,000 to the heirs of each deceased control subject). The settlement also established the Tuskegee Health Benefit Program, administered first by HEW and after 1979 by the Department of Health and Human Services, providing lifetime medical and burial benefits to subjects and to surviving spouses and offspring exposed to congenital syphilis through their fathers [10].

The Belmont Report (1979)

The National Commission for the Protection of Human Subjects of Biomedical and Behavioral Research, established by Congress under the National Research Act of 1974 in direct response to Tuskegee, issued its foundational document — the Belmont Report — on April 18, 1979. Verified The report articulated three governing ethical principles for federally-funded human-subjects research: respect for persons (the basis for informed consent), beneficence (the obligation to maximize benefits and minimize harms), and justice (the fair distribution of research burdens and benefits across populations). The report's implementing regulations, codified at 45 CFR Part 46 (the "Common Rule") in 1981 and revised most recently in 2018, established the institutional review board (IRB) system that governs human-subjects research in the United States to the present [11].

The 1997 Clinton apology

On May 16, 1997, President William J. Clinton delivered a formal apology to the Tuskegee survivors at the White House. Verified Five surviving subjects attended the East Room ceremony in person: Herman Shaw (then 94), Charlie Pollard (89), Carter Howard (93), Fred Simmons (110, the eldest surviving subject), and Frederick Moss (91). Three additional surviving subjects, unable to travel, were represented by family members. Clinton's prepared remarks contained the line, "What was done cannot be undone. But we can end the silence. We can stop turning our heads away. We can look at you in the eye and finally say, on behalf of the American people, what the United States government did was shameful, and I am sorry" [12]. The Clinton administration's accompanying initiative included $200,000 for a Tuskegee University bioethics center, expanded community-engaged research-ethics training, and the CDC's Tuskegee Legacy Project, established that year to address the durable effects on Black community trust in public-health institutions [13].

The contemporaneous justifications, and their later analysis.

The institutional justification offered for the Tuskegee Study while it was ongoing rested on three claims. Claimed First, that the study had genuine scientific value: the existing literature on the natural history of latent syphilis was thin, drew principally on the 1928 Bruusgaard re-analysis of the Norwegian Oslo cohort (a population of European urban patients of an earlier era), and could be substantially advanced by a long-term observational study in a different population. Second, that the men were receiving net medical benefit through the study's incidental care: free physical examinations, free transportation, free meals on examination days, the attentive nursing of Eunice Rivers, and modest burial benefits, in a context where the local non-study Black population received essentially none of these things. Third, that the available pre-penicillin syphilis treatments — the arsenicals (Salvarsan and Neosalvarsan), mercury, and bismuth — were of marginal therapeutic value, sufficiently toxic, and sufficiently demanding (twenty to forty injections over many months) that the absence of their administration in the study cohort was not the difference between treatment and non-treatment but the difference between two forms of inadequate care [1][3].

The contemporaneous internal counter-arguments, where they appear in the surviving PHS files, were focused not on the ethics of the study but on its scientific design. The most-articulated of these concerned cohort contamination: by 1947, an unknown number of the syphilitic-group subjects had received some penicillin from non-PHS sources, and the study's directors expressed concern in correspondence that the scientific design was being eroded by external treatment. The 1969 CDC review's vote to continue the study was, in its own internal characterization, a vote to preserve the remaining scientific value [3][6]. The HEW Panel's 1973 finding was unambiguous on all three of the original justifications: the scientific value had been overstated, the incidental medical benefits did not constitute treatment for syphilis, and the pre-penicillin period's argument about marginal therapeutic value was, in any event, irrelevant to the post-1947 period during which the curative treatment was deliberately withheld [8].

A separate strand of contemporaneous and retrospective argument, articulated principally by Allan Brandt in his 1978 Hastings Center Report essay "Racism and Research" and developed in subsequent historiography by James Jones, Susan Reverby, and Vanessa Northington Gamble, locates the study's institutional logic in the racial assumptions of the early-twentieth-century American medical profession. The PHS officers who designed and continued the study held documented beliefs about the differential epidemiology of syphilis in Black and white populations — specifically, that untreated syphilis in Black men produced predominantly cardiovascular rather than neurological complications — that the study was, in part, designed to test. The 1973 HEW Panel and subsequent historiography have characterized those background assumptions as essential to understanding why an observational study of this design was conducted in this population and not, for example, in the Norwegian urban patients whom Bruusgaard had already studied [14].

The unresolved questions.

The total mortality figure

The number of subjects who died as a direct result of untreated syphilis — as distinct from those who died from age-appropriate causes during the forty-year follow-up — cannot be precisely determined. Disputed The 1973 HEW Panel reported that approximately 28 men had died directly from syphilis-related complications and an additional 100 had died from related conditions, against a control-group death count of 96 from non-syphilis causes. Subsequent analysis by John Cutler's successors (relying on the Cutler papers recovered at Pittsburgh in 2003) raised the direct-mortality estimate. The Centers for Disease Control's 1996 retrospective re-analysis gave a lower bound of 28 direct deaths and an upper bound of approximately 100; the spread between the two figures has not been definitively narrowed in the public record [3][5][14].

Congenital and transmitted infection

The number of women infected by the subjects and the number of children born with congenital syphilis are not precisely known. Disputed The 1975 settlement extended the Tuskegee Health Benefit Program to surviving wives and to offspring with documented congenital syphilis exposure: by 1995, the program had enrolled 22 wives and 17 offspring with confirmed congenital syphilis [10]. Whether this represents the full population of secondary cases or only those who came forward is not resolvable from the existing record.

The Cutler papers and the Guatemala connection

John Cutler's involvement in both the Tuskegee Study and the 1946–1948 Guatemala syphilis experiments — in which Guatemalan prisoners, mental-hospital patients, and soldiers were intentionally infected with syphilis and gonorrhea — was substantially documented only after Susan Reverby's 2010 discovery of Cutler's archived papers at the University of Pittsburgh. Verified The Obama administration's October 2010 apology to Guatemala — delivered jointly by Secretary of State Hillary Clinton and Secretary of Health and Human Services Kathleen Sebelius — followed Reverby's publication of her findings. Whether other PHS files comparable to Cutler's contain comparable documentation of unethical research not yet brought to public attention is, as of 2026, not definitively resolved [14][15]. The Reverby discovery suggests the surviving documentary base is broader than the 1973 HEW Panel could access.

The community-trust question

The durable effect of Tuskegee on Black community trust in U.S. public-health institutions is the subject of substantial empirical literature. Disputed Studies by Reverby, by the CDC's Tuskegee Legacy Project, and by Vanessa Northington Gamble have argued that Tuskegee is a marker rather than a sole cause of distrust, and that pre-existing institutional racism in U.S. medicine is the larger explanatory variable. A counter-strand of literature has argued that Tuskegee's specific cultural transmission — through Black community memory, media coverage, and discussions in churches and barbershops — has had an identifiable independent effect on health-seeking behavior, particularly visible in lower clinical-trial participation rates and elevated hesitancy in vaccine programs from the 1980s onward. The empirical literature is unresolved on the relative magnitude of these effects [13][14].

The institutional accountability question

No PHS or CDC officer was ever criminally charged in connection with the Tuskegee Study. Claimed The civil settlement of 1975 closed the financial-liability question for the subjects and their families; no comparable accountability proceeding was conducted against the individual decision-makers. The HEW Panel's 1973 report named institutional responsibility but did not recommend individual prosecution; the U.S. Department of Justice in 1973 declined to open a criminal investigation, citing statute-of-limitations issues and the institutional rather than individual character of the decisions. The 1997 Clinton apology was institutional rather than directed at named individuals. Whether the absence of individual accountability constitutes a third-order failure of the Tuskegee response is a question raised by Reverby and others and not formally addressed in the surviving federal record [10][14].

Primary material.

The accessible primary record on the Tuskegee Study is held at multiple locations:

• The National Archives (NARA), Record Group 442, holds the Centers for Disease Control's records covering the study, including the operational case files from 1957 (when authority transferred from PHS Venereal Disease Division to CDC) through 1972.
• The National Library of Medicine at NIH holds the published PHS literature on the study (the 1936, 1953, 1955, 1964, and 1972 follow-up papers in Public Health Reports, Archives of Internal Medicine, and other medical journals), and Eunice Rivers's papers.
• The Tuskegee University Archives holds the institutional records of the John A. Andrew Memorial Hospital and the Tuskegee Institute's collaboration with the PHS, including correspondence between Dr. Eugene Dibble and the PHS directors.
• The University of Pittsburgh Archives Service Center holds the John C. Cutler Papers, including the materials covering both the Tuskegee Study and the Guatemala experiments. These were brought to scholarly attention by Susan Reverby in 2010.
• The HEW/HHS Tuskegee Health Benefit Program records, administered through CDC, provide the ongoing benefit-administration documentation including the cohort death roster and the wives-and-children secondary enrollment records.
• The William J. Clinton Presidential Library holds the 1997 apology event records, including the survivor invitation files and Clinton's drafting marginalia.

Critical individual documents include: the 1929 Rosenwald Fund report on the Macon County syphilis prevalence survey; the October 1932 PHS authorization correspondence between Clark and Vonderlehr; the 1933 "Last Chance for Special Free Treatment" letter inviting subjects to the lumbar-puncture round; the 1947 and 1952 internal PHS memoranda documenting the decision to withhold penicillin; the 1965 Irwin Schatz letter; Peter Buxtun's 1966 and 1968 internal complaints; the 1969 CDC blue-ribbon panel report voting to continue the study; the 1972 Jean Heller AP story; the April 1973 HEW Ad Hoc Advisory Panel report; the 1974 settlement documents in Pollard v. United States; the 1979 Belmont Report; and the May 16, 1997 Clinton apology transcript.

The sequence.

1. 1929–1931 Rosenwald Fund syphilis-control demonstration project in six Southern counties; Macon County's 35-percent prevalence is the highest documented.
2. October 1932 Tuskegee Study formally begins under Dr. Taliaferro Clark of the PHS Venereal Disease Division. Original design: six-to-twelve-month observational study.
3. 1933 Dr. Raymond Vonderlehr succeeds Clark; the study is extended indefinitely. The "Last Chance for Special Free Treatment" letter is issued.
4. 1934 Nurse Eunice Rivers joins the study; she will remain with it for the next thirty-eight years.
5. 1936 First published PHS paper on the study (Vonderlehr et al., Venereal Disease Information).
6. 1943 John Mahoney at the PHS Venereal Disease Research Laboratory demonstrates penicillin's effectiveness against syphilis.
7. 1943–1945 Macon County draft board exempts 256 study subjects from military syphilis-treatment requirements at PHS request.
8. 1947 Penicillin established as federal standard of care for syphilis. Internal PHS decision: Tuskegee subjects to be excluded from treatment to preserve study integrity.
9. 1953 Eunice Rivers et al. publish "Twenty Years of Followup Experience in a Long-Range Medical Study" in Public Health Reports.
10. 1957 Administrative authority transfers from PHS Venereal Disease Division to the new Centers for Disease Control's Venereal Disease Branch.
11. 1964 Study published in Archives of Internal Medicine, prompting Dr. Irwin Schatz's 1965 letter of objection.
12. 1966 Peter Buxtun raises internal CDC objection. Repeated 1968.
13. 1969 CDC blue-ribbon panel votes to continue the study.
14. 1972 (early) Peter Buxtun turns over documentation to AP reporters.
15. July 25, 1972 Jean Heller's AP story runs nationally. The Washington Star publishes "Syphilis Victims in U.S. Study Went Untreated for 40 Years."
16. August 1972 HEW Ad Hoc Advisory Panel convened.
17. November 16, 1972 Study formally terminated by Assistant Secretary for Health Merlin DuVal.
18. April 28, 1973 HEW Ad Hoc Advisory Panel issues final report.
19. 1974 National Research Act establishes the National Commission for the Protection of Human Subjects of Biomedical and Behavioral Research.
20. December 1974 – early 1975 Pollard v. United States settlement: $10 million and the Tuskegee Health Benefit Program.
21. April 18, 1979 Belmont Report issued.
22. 1981 Common Rule (45 CFR Part 46) codifies federal human-subjects research regulation.
23. May 16, 1997 President Clinton delivers formal apology at the White House to five surviving subjects.
24. 1997 CDC Tuskegee Legacy Project established. $200,000 grant to Tuskegee University bioethics center.
25. January 16, 2004 Ernest Hendon, the last surviving subject, dies at age 96.
26. 2010 Susan Reverby publishes findings on the Cutler papers and the Guatemala syphilis experiments. Obama administration apologizes to Guatemala.

Cases on this archive that connect.

MK-Ultra (File 001) — the parallel-era CIA program of human experimentation. Tuskegee and MKULTRA ran simultaneously through the 1953–1972 period and exposed comparable failures in federal oversight of human-subjects research, but came to public attention separately and through different institutional pathways.

Project ARTICHOKE (File 014) — MKULTRA's predecessor program; the 1953–1972 Tuskegee continuation overlaps the full life of the CIA's chemical-and-hypnosis interrogation research. The Belmont Report's 1979 framework explicitly responds to both pillars of postwar unethical research.

COINTELPRO (File 009) — the FBI's parallel-era program of domestic political disruption. Both Tuskegee and COINTELPRO were ended by whistleblower disclosure (Buxtun and the Citizens' Commission burglary respectively); both produced post-exposure regulatory reform.

Planned: the Guatemala syphilis experiments (Cutler, 1946–1948), the Willowbrook hepatitis studies, the Holmesburg Prison experiments, the Edgewood Arsenal experiments.

Full bibliography.

1. Jones, James H., Bad Blood: The Tuskegee Syphilis Experiment, Free Press, 1981 (new and expanded edition 1993). The foundational scholarly account.
2. Rosenwald Fund and PHS, 1929–1931 syphilis-control demonstration project records. National Archives Record Group 90 (PHS Records).
3. Centers for Disease Control records on the Tuskegee Study, 1957–1972. National Archives Record Group 442. Includes internal memoranda on penicillin withholding, the draft-board coordination, and the 1969 blue-ribbon panel.
4. Rivers, Eunice; Schuman, Stanley H.; Olansky, Sidney; and Vonderlehr, Raymond A., "Twenty Years of Followup Experience in a Long-Range Medical Study," Public Health Reports, Vol. 68, No. 4 (April 1953).
5. U.S. Public Health Service Division of Venereal Diseases records, 1932–1957. National Archives Record Group 90.
6. Buxtun, Peter, internal CDC correspondence 1966 and 1968. Subsequently made part of the HEW Ad Hoc Advisory Panel record.
7. Heller, Jean, "Syphilis Victims in U.S. Study Went Untreated for 40 Years," Associated Press wire story, July 25, 1972. Front page Washington Star same day; The New York Times July 26, 1972.
8. U.S. Department of Health, Education, and Welfare, Ad Hoc Advisory Panel on the Tuskegee Syphilis Study, Final Report, April 28, 1973.
9. National Research Act of 1974, Public Law 93-348, July 12, 1974.
10. Pollard v. United States, settlement records, U.S. District Court for the Middle District of Alabama, 1974–1975. The Tuskegee Health Benefit Program documentation. Administered by HHS, public summaries available through the CDC Office of Minority Health.
11. National Commission for the Protection of Human Subjects of Biomedical and Behavioral Research, "The Belmont Report: Ethical Principles and Guidelines for the Protection of Human Subjects of Research," April 18, 1979. Codified at 45 CFR Part 46.
12. Clinton, William J., "Remarks in Apology to African-Americans on the Tuskegee Experiment," East Room of the White House, May 16, 1997. William J. Clinton Presidential Library.
13. Centers for Disease Control and Prevention, "The Tuskegee Legacy Project" archive (1997 onward). Tuskegee Legacy Project research-ethics initiative documents.
14. Reverby, Susan M., Examining Tuskegee: The Infamous Syphilis Study and Its Legacy, University of North Carolina Press, 2009. Also Reverby, "'Normal Exposure' and Inoculation Syphilis: A PHS 'Tuskegee' Doctor in Guatemala, 1946–48," Journal of Policy History, Vol. 23, No. 1 (2011).
15. John C. Cutler Papers, University of Pittsburgh Archives Service Center. Identified and brought to scholarly attention by Susan Reverby, 2010.