Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Notes from the Field: Use of Electronic Cigarettes and Any Tobacco Product Among Middle and High School Students United States, 20112018 MMWR Report finds there is no harm in passive vaping NZ Herald Vape Puffs vs. Cigarettes: How Many Equal One? In secondhand vape, scientists smell risk American Heart Association How many puffs of vape is equal to cigarettes