How secondhand smoke, thirdhand smoke & vaping affects kids Secondhand Smoke vs Vape: What the Science Says Exposure to secondhand vaping fumes among teens raises concerns UPI.com Millions of people are exposed to secondhand smoke every day. People living in multi unit housing are some of the most exposed. The only way to fully protect people from secondhand smoke at Study finds secondhand smoke may be source of lead exposure in children, adolescents Vital Record Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center