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This issue is particularly common in children and can be exacerbated by exposure to smoke

On the heels of another damning statistic against tobacco it kills more than 7 million people each year, the World Health Organization said recently come questions about whether vaping is a healthier substitute

10.1073/pnas.95.20.11715 30 ChandelN

Even though the researchers did not examine the effect of repeated exposure of lung bacteria to vape or smoke or investigate the effect of any of the e-cigarette flavourings, this should be a point of focus for future research, especially as there are concerns about the potential toxicity of a number of common e-cig flavourings