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Analyses: Heart attack rates fall 17% after smoking bans enacted
USA Today - Liz Szabo

Community smoking bans have an immediate and dramatic effect on reducing heart attacks, according to two new analyses of laws in the USA, Canada and Europe. Two separate analyses released Monday each found that heart attack rates fall 17% within a year after smoking bans take effect. One analysis, which included 13 studies, appears in Circulation: Journal of the American Heart Association. A second analysis, which considered 11 studies, appears in the Journal of the American College of Cardiology.