The Hazards of Passive -- And Active -- Smoking

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Abstract
Research on the hazards of smoking has turned recently to the association between exposure to environmental tobacco smoke (passive smoking) and adverse health events, including lung cancer,1,2 other respiratory diseases,3 and even brain tumors in children4. Passive smoking causes more frequent and more severe attacks of asthma in children who already have the disease, and it may increase the number of cases of asthma among children who have not had previous episodes3. In each of the studies on which these conclusions were based, the assessment of exposure was limited to data obtained by means of questionnaires from . . .