According to a Centers for Disease Control and Prevention (CDC) study, 40% of U.S. adults believe that children's exposure to secondhand aerosol from e cigarettes causes only some or little harm, and 5% In secondhand vape, scientists smell risk American Heart Association Chemicals Secondhand vape exposure: Risks and side effects In secondhand vape, scientists smell risk American Heart Association Does cannabis create thirdhand smoke? Thirdhand Smoke Resource Center