Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA Are E Cigarettes Safe? What Doctors Think How secondhand smoke, thirdhand smoke & vaping affects kids Vaping, Venous Valves, and Vein Disease According to the American Heart Association, the risks of secondhand smoke from vapes are still being discovered. Learn about the dangers of secondhand smoke from vapes. Vaping May Be More Dangerous Than Cigarette Smoking, Studies Show University Hospitals