Your lungs may be aging faster than you realize. Learn the hidden signs of declining lung function and how to protect your ...

Five years on, scientists are starting to understand how the virus can lead to long-term, sometimes invisible changes.

Stage 4 lung cancer means that cancer has spread from the lung to other parts of the body. Treatment may help slow its spread or manage your symptoms. Doctors stage lung cancer based on how far it ...

The air moves through tubes in the lungs to tiny air sacs called alveoli. Oxygen passes from these into the blood, which carries the oxygen to all the cells in the body. The alveoli absorb carbon ...