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The survey categorized respondents into four smoking profiles: smoker, occasional smoker, former smoker, and never smoker

What did Arnold's prognosis look like

This suggests that early e-cigarette effects might be subtle or primarily affect small airway function and respiratory comfort rather than gross lung volumes in the short term

2013: Psychopharmacology "Acute electronic cigarette use: nicotine delivery and subjective effects in regular users": This study found there are big individual differences in nicotine levels among e-cigarette users, even when they all vape on the same device

But if you are someone who does not smoke at all, starting to vape isnt a good idea either