Teenager diagnosed with irreversible Popcorn Lungs: What is it? Symptoms, causes, and how to stay safe

American teens face vaping dangers. Brianne Cullen, a 17-year-old, got popcorn lung. Vaping caused her breathing issues. Doctors say it is due to chemicals in e-cigarettes. Popcorn lung is a serious disease. It damages small airways. Symptoms include cough and breathlessness. Cullen uses an inhaler now. The disease can cause long-term problems. Experts warn against vaping.