The New York Times reports that even one cigarette a day is bad for your health:
A person who habitually smokes just one cigarette a day is nine times as likely to die from lung cancer as a nonsmoker, and even if he or she quits at age 50, still has a 44 percent increased risk of premature death.It would be especially awful to smoke just one cigarette a day and die from a smoking-related illness, no? Quit.
All OCA cigarette posts (Pinboard)
[Four or five cigarettes a day was my habit, many years ago.]