Experts urge parents not to vape near kids as study finds second hand vapor causes build up of chemicals linked to CANCER Daily Mail Online 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 Can you get second hand smoke from a vape Myth Buster ~ "Second hand vape smoke" is actually water vapour and is not harmful to other people or the environment. #vape #vaping #vapeuk #ecigerette #smoke #quit