Radiologic, Pathologic, Clinical, and Physiologic Findings of Electronic Cigarette or Vaping Product Useassociated Lung Injury (EVALI): Evolving Knowledge and Remaining QuestionsRadiology The Chemistry of Vaping ChemistryViews Outbreak of Lung Injury Associated with the Use of E Cigarette, or Vaping, Products Electronic Cigarettes Smoking & Tobacco Use CDC Vaping has become common, but it's important to know what you're inhaling. Many e cigarettes contain nicotine, heavy metals like nickel and lead, and chemicals that can harm your lungs and overall health.