How Electronic Cigarettes Work HowStuffWorks A brief history of e cigarettes E cigarettes with cigarette like nicotine delivery reduce exposure to lung carcinogen Penn State Health News Johns Hopkins Medicine Team Proposes Ways to Regulate and Better Manage E Cigarette Use Johns Hopkins Medicine Smoking and vaping are often compared, but neither is harmless. While they work differently, both can expose the lungs to addictive nicotine and harmful chemicals that impact breathing and overall health. Smoking