How E Cigarettes Affect Your Body Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times The Dangers of Secondhand & Thirdhand Smoke Exposure Sitting somewhere when a cloud of cotton candy vapor washes over you? If you can smell the sweet scent of a vape, that's not a great sign.