how much margin in cigarettes Charted: The Decline of Cigarette Smoking U.S. Young Adults More than a decade after

Occupation: Crime fighter

However, the important part here is this is not an exact science

The first review was an overview of Cochrane reviews on the benefits and harms of behavioural, pharmacologic, and other (e.g., acupuncture) therapies.22 We conducted an overview of Cochrane reviews because there were existing Cochrane reviews of all interventions that would likely be considered and these reviews transparently report assessments of risk of bias and other elements important for assessing evidence certainty

Given that there is no safe tobacco product, youth and adults who do not use tobacco products should not start using e-cigarettes

Prolonged exposure to second-hand smoke can cause airway inflammation, broncho-constriction, airway obstruction and lung tissue damage, increase the likelihood of developing COPD, worsen existing COPD symptoms and accelerate lung function decline [100, 101]