Hon Lik invented the e cigarette to quit smoking but now he's a dual user Vaping The Guardian E Cigarettes Market Size, Share Report 2026 to 2035 Printouts Parents Against Vaping E cigarettes F.D.A. Moves to Restrict Flavored E Cigarette Sales to Teenagers The New York Times Smoking and Vaping National Institute of Environmental Health Sciences Analysis of e cigarette warning letters issued by the Food and Drug Administration in 2020 and 2021 Tobacco Control