When someone vapes around others they expose them to 'second hand aerosol'. But what happens to that aerosol then? Does it disappear or is it like cigarette smoke and stays around, sticking to Vaping is harmful in 3 ways: 1.) To the user, as harmful ingredients are not disclosed. 2.) To others, as vape clouds contain cancerous chemicals, heavy metals, and nicotine, which can be Can Vaping Stain Walls? IQOS Philippines Can You Vape Indoors?