What harm does second hand fumes from vaping cause to young lungs? Medical experts want to know ABC11 Raleigh Durham Should I Be Concerned About Secondhand Vaping? Secondhand and thirdhand vape exposure is a serious issue, especially when children are involved. Unlike firsthand vaping, which directly introduces harmful chemicals into the lungs, secondhand exposure affects those nearby, How secondhand smoke, thirdhand smoke & vaping affects kids 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. Chemicals