Smokers switching to e cigarettes have an increased heart attack risk, says ICMR study: Why quitting smoking is the only way out Global youth vaping and respiratory health: epidemiology, interventions, and policies npj Primary Care Respiratory Medicine The Health Impacts of E Cigarettes E cigarettes present risk to teenage health as new research sparks concern over number of users Daily Record E cigarette use and respiratory symptoms in adults: A systematic review and meta analysis Electronic cigarettes: Help or hazard? Harvard Health