What does the smell of stale tobacco smoke mean? Thirdhand Smoke Resource Center How Long Does Second Hand Smoke Stay in Your System Many young people who vape did not smoke cigarettes before they started vaping. But young people who vape are more likely to start smoking cigarettes than those who never vape. For help Does Vaping Cause Secondhand Smoke? Effects of Cannabis vs. Vaporizers on Respiratory Symptoms Is Vaping Bad For You? Side Effects, Risks, Nicotine, Marijuana