"In the 1920s, German scientists correctly picked up on x-rays as a possible source of genetic damage. In the same decade they also launched a huge campaign against tobacco."
"A decade later, Nazi scientists identified the dangers of organochlorine pesticides such as DDT before anyone else, and launched campaigns to discourage alcoholism. German scientists of the period made the link between asbestos and lung cancer and developed the first high-powered electron microscope."
https://www.theguardian.com/news/2004/oct/14/thisweekssciencequestions.cancer
"Physicians at Ravensbrück conducted experiments in bone-grafting and tested newly developed sulfa https://encyclopedia.ushmm.org/content/en/article/nazi-medical-experiments(sulfanilamide) drugs."