Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Does cannabis create thirdhand smoke? Thirdhand Smoke Resource Center Can You Actually Get a Contact High? Green Goods Second hand vape smoke linked to more asthma symptoms in kids Millions of people are exposed to secondhand smoke every day. People living in multi unit housing are some of the most exposed. The only way to fully protect people from secondhand smoke at Secondhand vape plumes could form lung damaging radicals American Chemical Society