The Dangers of Secondhand & Thirdhand Smoke Exposure From flavor bans to secondhand aerosol exposure, there's a lot people don't realize about how vaping impacts health, policy, and safety. Flavor restrictions can change tobacco use patterns, influence black market Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA E Cigs and Second Hand Vaping: Dangers and Protections Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center