Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek 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 Secondhand Smoke Social Media Message Library Tobacco Education Clearinghouse of California Tobacco Smoke, Vaping, and Asthma AAFA.org