The Issues of Testing for Secondhand Smoke. Indoor Science Tobacco Smoke, Vaping, and Asthma AAFA.org Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice How Bad Is Second Hand Vape Smoke Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky Secondhand Smoke Vermont Department of Health Smoking and Vaping Harms Your Heath CleanEarth4Kids.org