Does Vaping Cause Lung Cancer? What We Know (and Still Don't) Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Vaping isn't just vapor. It's an aerosol filled with nicotine and chemicals that go deep into your lungs and straight into your bloodstream. Many vapes contain: Highly addictive nicotine Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA