Ethical requirement that subjects fully understand risks before agreeing to medical procedures or research
Informed consent is the ethical and legal principle that individuals must be provided with complete, accurate information about the risks, benefits, and alternatives of a medical procedure, treatment, or research study before agreeing to participate. The concept emerged directly from the exposure of medical atrocities — and its violations are central to many of the claims documented on They Knew.
The Nuremberg Code, established after the prosecution of Nazi doctors who conducted horrific experiments on concentration camp prisoners, made voluntary consent "absolutely essential" for human experimentation. The Declaration of Helsinki (1964) and the Belmont Report (1979) further codified informed consent requirements. In the U.S., the Common Rule (45 CFR 46) governs informed consent for federally funded research.
Despite these protections, violations of informed consent are disturbingly common. MKUltra administered LSD and other drugs to unwitting subjects. The Tuskegee Syphilis Study deceived Black men about their diagnosis for 40 years. Operation Sea-Spray involved the U.S. military spraying bacterial agents over San Francisco without public knowledge. More recently, concerns about informed consent have arisen regarding expedited vaccine approval processes and the adequacy of disclosure about potential adverse events.
