E Cigarettes (Vapes) Smoking and Tobacco Use CDC Vaping: not a safe alternative to smoking, new study suggests, and it may be more harmful to health than tobacco in normal cigarettes South China Morning Post Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Vaping might seem safer than smoking but your heart could tell a different story Amazon.com: NICOTESTS Nicotine Second Hand Smoke and Vape 10 ng Test (5 Pack) : Health & Household