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Respiratory Symptoms A cross-sectional study surveyed ~45,000 adolescents in Hong Kong from 2012 to 2013 regarding e-cig use in the prior 30 days and respiratory symptoms (130), reporting increased cough or phlegm in e-cig users [odds ratio (OR) 2.1, confidence interval (CI) 1.82.5], including the subset of never smokers (OR 2.1, CI 1.33.4)

Custom-fitted whitening trays provided by a dentist can also offer effective results with the added benefit of being able to use them at home

While data are still emerging about the specific impacts of the virus on people who use tobacco, conclusive evidence shows that smoking weakens the immune system and increases the risk of respiratory infections

- How does smoking impact dental treatment effectiveness

its also about how people use them and think about them

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