Avoiding Tobacco Smoke and E Cigarette Aerosol Is a Key Part of Asthma Management Asthma and Allergy Foundation of America Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM While vaping is not risk free, it is less harmful than tobacco Our World in Data It's Not Just Cigarettes: Vape Residue Sticks on Surfaces Too Thirdhand Smoke Resource Center Think it's just harmless water vapor? Think again. The aerosol from vapes isn't safe not for you and not for anyone around you. What's really in secondhand vape aerosol?