E Cigs and Second Hand Vaping: Dangers and Protections Thirdhand Smoke Resource Center Protecting Californians 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 vape exposure: Risks and side effects Can You Fail a Drug Test From Secondhand Smoke? Test Smartly Labs Sitting somewhere when a cloud of cotton candy vapor washes over you? If you can smell the sweet scent of a vape, that's not a great sign.