Evidence Mounts About the Health Impact of Second Hand Vaping Bisnar Chase Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC The Issues of Testing for Secondhand Smoke. Indoor Science Chugachmiut See the sites below for more information on secondhand smoke: https: www.healthline.com health second hand vape#at risk groups https: www.webmd.com lung cancer guide vaping lung cancer#:~:text=Ecigarettes%2C%20sometimes%20called%20vapes