Can you get second hand smoke from vape? Vaping Post According to a Centers for Disease Control and Prevention (CDC) study, 40% of U.S. adults believe that children's exposure to secondhand aerosol from e cigarettes causes only some or little harm, and 5% Effects Of Second Hand Vape Smoke Thirdhand Smoke Resource Center Tobacco Smoke, Vaping, and Asthma AAFA.org 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.