Even if a theoretical estimate of the total effect of other persons' smoking was made (including the incremental risk to current and past smokers), this latter component would have to be deducted from the total tobacco-attributable fraction, as involuntary smoking cannot occur without active smoking by others
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From a regional perspective, we can see many countries in Europe and Asia have higher rates of tobacco use
Air is drawn to the burning zone through the unlighted end of a cigarette, and smoke is expelled back through the cigarette or out through the mouth
To vape or not to vape subject of SPH Bicknell Lecture tomorrow To anyone who has followed the controversy around the perceived merits and health risks of e-cigarettes, the research and reactions can seem a jumble