Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA E Cigarettes and Pregnancy Maternal Infant Health CDC Vaping and Electronic Cigarette Toxicity Overview and Recommendations (Project VECTOR) Intrepid Lab E Cigarettes: Know the Health Risks Department of Health 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.