Vaping releases toxic chemicals, including heavy metals, as well as ultrafine particles that go deep into the lungs. These increase the risk of heart and lung disorders. Vaping and Electronic Cigarette Toxicity Overview and Recommendations (Project VECTOR) Intrepid Lab Emerging Phenomenon of Electronic Cigarettes Page 3 Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Vaping and E Cigarettes Causing Outbreak of Respiratory Illnesses, Other Severe Health Problems, and Deaths Sommers Schwartz Full article: Disposable electronic cigarettes chemical composition and health effects of their use. A systematic review