IG Farben (now Bayer) pays physicians to test drugs at three concentration camps in Germany.
Date: 1941
Physicians are paid retainers by IG Farben (today known as Bayer) to test anti-typhus drugs by infecting people in the concentration camps with typhus. Typhus can cause fever, headaches, and sometimes rash. A senior Bayer official oversees the chemical factory, vetting all experiments.