E cigarettes, or vapes, use a battery to heat a liquid containing nicotine and other substances into an aerosol. Vaping is the inhalation of this product. So, why should you avoid them? In Are E cigarette Users at Greater Risk of Poor Immune Response to Flu, COVID? Newsroom Liquide cigarette lectronique Carte d'e liquides par Vaping Silver Cigarettes Vs. Vaping: That's The 'Wrong Comparison,' Says Inhalation Researcher KFF Health News Up in Vapor American Physiological Society Ilona Jaspers Leading at the Intersection: Climate, Health, and the Power of Convergence Science Byrd Polar and Climate Research Center