Adolescents who use e cigarettes are more likely to use conventional cigarettes What Does Vaping Do to Your Lungs? Johns Hopkins Medicine A Guide to Volts, Ohms and Resistance in E Cigarettes & Vaping Update: Demographic, Product, and Substance Use Characteristics of Hospitalized Patients in a Nationwide Outbreak of E cigarette, or Vaping, Product UseAssociated Lung Injuries United States, December 2019 MMWR