Puffed out - Daily cigarette smoking by men and women

TOO many people use tobacco, hardly a new fact. But exactly how many people smoke where—as well as how old they are, how many cigarettes they smoke each day and at what the rate they quit—has remained somewhat blurry. A new study helps to change that. The World Health Organisation, America's Centres for Disease Control and the Canadian Public Health Association created a new surveillance system to gather comparable data on tobacco use around the world. In the Lancet, Gary Giovino of the University of Buffalo reports the first results from the new survey.

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