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 Should I Be Concerned About Secondhand Vaping? Secondhand vape exposure regulation of CFTR and immune function in cystic fibrosis American Journal of Physiology Lung Cellular and Molecular Physiology American Physiological Society How can I protect my child from thirdhand smoke in homes? Thirdhand Smoke Resource Center