Researched
Smoking causes lung cancer
Doll and Hill's 1950 hospital study and the British Doctors Study from 1951 showed that smoking greatly raises lung cancer risk, founding tobacco control.
Open in the interactive tree →Comparing patients with and without lung cancer, they found heavy smokers far over-represented; the 1964 US Surgeon General report drew the same conclusion. The WHO tobacco treaty (FCTC) followed in 2003.