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In addition, while long-term health effects of vapes need to be studied further, the double exposure to large amounts of nicotine and toxicants from both conventional cigarettes and vapes are a great concern for public health. Related Article: Health news watch: what patients read about in June The researchers said that while dual use may help heavy smokers reduce the use of conventional cigarettes, the high levels of nicotine in vapes could continue a nicotine addiction

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Am J Epidemiol, 119(6): 896-906

[17] His great-great-grandfather Robert Morrison (b