Does this advertisement make you feel more comfortable about the health effects of smoking cigarettes? Of course not! But bake in 1946 this was looked at as a highly effective advertisement strategy by tobacco companies.
It is now known that tobacco companies were actually aware of the danger that smoking cigarettes caused well before that information became public. In 1952 Reader's Digest came out with an article that revealed the true risk, which brought the tobacco industry under heavy fire and caused them to decrease the deleterious effects of their product. Their initial response was to add filters to their cigarettes. Tobacco companies were likely aware that the public outing of the dangers of tobacco was eminent, so they probably launched advertising campaigns, including ads like the one featured in this blog. This advertising campaign was an effort to convince smokers of the legitimacy of their products, and that they are so healthy even health professionals use them!
The author of this ad is using the support of professional authority to manipulate its viewers into believing false information. The smaller images along the bottom of the ad show multiple doctors enjoying cigarettes, while adorned in their professional attire and striking professional poses. These images are accompanied by the slogan, "The doctors' choice is America's choice!" This is another way the authors reiterate that the notion of cigarettes being unhealthy is inaccurate.
This was not the only ad featuring doctors as tobacco's spokespeople, but several others including TV commercials use the same tactics to manipulate their viewers to believing that cigarettes are healthy when they're actually really dangerous!
Check this TV commercial from 1949 to see for yourself!