How secondhand smoke, thirdhand smoke & vaping affects kids Is Secondhand Vaping Harmful To Your Health? Juul study shows secondhand vaping emissions are less toxic than cigarette smoke 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 What Are the Risks from Secondhand Vape Smoke? NVB Inc. Secondhand Smoke and Secondhand Vaping: Both Bad for Kids University Hospitals