Vaping Produces Far Less Second Hand Nicotine Than Smoking Respiratory Therapy Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Secondhand Smoke and Secondhand Vaping: Both Bad for Kids University Hospitals Is 2nd Hand Vape Smoke Bad Is There 2nd Hand Smoke From Vapes Covid 19 No judgment just real talk If you smoke, vape, whatevercool. But you still gotta take care of your lungs. Your body wants to clear mucus Buildup = thicker phlegm + breathing issues