JF Ptak Science Books Quick Post
This ad comes from my own run of LIFE magazine and dates from January 7, 1946. It was a a massive campaign, begun at least by 1946 and establishing the tag about "More Doctors smoke Camels than any other cigarette!", and is widely viewed as one of the most successful campaigns of any cigarette ever undertaken, which means it probably killed more people than did any other advertising campaign. This means too that more doctors were dying of smoking-related cancers, too, than by any other cigarette brand.
Plus, all that unfiltered tarry smoke makes the doctor a delight to smell, as well, especially if they were smoking through coffee grinds, in spite of that white rounds coat.
See the fine Stanford Collection of ciggie ads, here.