It's important to protect children from cigarette smoke, and it's just as important to do the same with vaping. Secondhand vape smoke aerosol isn't harmless It contains tiny particles that can Secondhand Vape Exposure: Effects, Who's at Risk, and More Avoiding Tobacco Smoke and E Cigarette Aerosol Is a Key Part of Asthma Management Asthma and Allergy Foundation of America If you vape, you inhale a lot of harmful substances. These can damage your heart and lungs.