1950

Publication by Doll and Hill in UK (relying on a study population of smoking British physicians), followed by 1954 U.S. study of Hammond and Horn (with study population of 192,174 males with lung cancer) that cigarette smoking led to lung cancer. Both studies identified a several-year latency period before lung cancer was manifest. Subsequent lung cancer research reaffirmed the linkage, and U.S. Surgeon General and UK Research Council to issue official public health reports that cigarette habit was dangerous to health (Ruegg; Use).