Breathing in someone else's smoke or vape isn't harmless. Secondhand smoke exposure can affect your lungs, brain, and overall health. Protect your families and yourself. Inhalar el humo o el vapor de Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC The Impact of E Cigarettes and Asthma: What You Need to Know Secondhand Vape Exposure: Effects, Who's at Risk, and More