Marijuana and Vaping: Shadowy Past, Dangerous Present The New York Times Smokers and Vapers May Be at Greater Risk for Covid 19 The New York Times Impacts of vaping and marijuana use on airway health as determined by exhaled breath condensate (EBC) Respiratory Research Springer Nature Link Vaping For Beginners: How Do You Inhale and Exhale Vapor? Medical Marijuana, Inc. Vaping: How E cigs Work (Infographic) Live Science Vapers overtake smokers for first time in Great Britain