Effect of second hand fumes from vaping on young lungs Ever puffed a vape around others thinking it's harmless? Think again. Inhaling vapor from e cigarettes exposes you to harmful chemicals, such as formaldehyde. These toxic substances can be passed on to Secondhand Vape Plumes Could Form Lung damaging Radicals Secondhand Vape Aerosol and Kids Kick It California Secondhand exposure to vaping can cause serious respiratory issues study The Jerusalem Post