You only have to inhale through the vaping devices mouthpiece and puff its aerosol, which is similar to the act of smoking
[11] Shu Wang, David Merriman, and Frank Chaloupka, Relative Tax Rates, Proximity, and Cigarette Tax Noncompliance: Evidence from a National Sample of Littered Cigarette Packs, Public Finance Review 47:2 (March 2019): 276-311
99%, not the weaker stuff
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
Facous on Quality : Workers are over 3 years experienced