Between World War II and the Vietnam War, doctors in the United States believed it was a good thing to medically experiment on disabled people, people in mental hospitals and prisoners of the State.
They would often say it was being done for the “greater good.” Plus, these people had no recourse and couldn’t defend themselves legally nor sign consent.
These experiments included spraying pandemic flu virus up the noses of Maryland state prisoners. These experiments also included purposely giving mental patients in Connecticut hepatitis.
If that’s not enough, in a New York hospital, doctors intentionally injected cancer cells into chronically ill people: https://humansarefree.com/2017/07/the-polio-conspiracy-doctor-praised-for-curing-polio-actually-created-new-strains-helped-spread-the-disease.html