Today is designated the "Great American Smokeout" by the American Cancer Society.
Here's some evidence that unscrupulous marketing techniques from cigarette companies go way back. In the early 20th century, "tobacco company Brown and Williamson claimed that its Kool cigarettes kept people's waists slim, their heads clear, and their bodies protected against colds."
(From Gene Stone's book The Secrets of People Who Never Get Sick, page 23). The last one really gets me--smokers are sick WAY more than the rest of us!