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. Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times Is Secondhand Vaping Harmful To Your Health? Have you ever breathed in secondhand vapor from a vape? What exactly are you inhaling? It turns out it's a lengthy list of chemicals. FULL STORY