Sometimes when people vape for the first time they can feel quite unwell and, in some cases, they can actually be sick. This is due to the nicotine they're ingesting and is What Happens When You Quit Smoking and Start Vaping A Less Harmful Alternative Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA PolitiFact When someone's vaping nearby, what are you breathing in? The risks of vape pens' secondhand aerosols E cigarette flavors are toxic to white blood cells, warn scientists Vaping vs. smoking: Long term effects, benefits, and risks