Secondhand Vape Exposure: Effects, Who's at Risk, and More 5 Vaping Facts You Need to Know Johns Hopkins Medicine 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 Secondhand smoke and secondhand aerosol Is Secondhand Vaping Harmful To Your Health? Should I Be Concerned About Secondhand Vaping?