Second hand Smoke or Vapor is a Serious Health Hazard for Children UTMB Department of Pediatrics UTMB Secondhand smoke may be a substantial contributor to lead levels found in children and adolescents, new study finds Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Family second hand smoke awareness NHS Lanarkshire First, Second and Thirdhand Smoke: The Differences and Dangers Tobacco Stops With Me