Most of us pay little attention to the workings of our lungs but the COVID-19 pandemic has sparked interest in their functioning and fear about the risks they face. Dr MeiLan K. Han, a leading pulmonologist and a national spokesperson for the American Lung Association, takes readers on a fascinating tour of this most vital organ.

Han explains the wonder of breathing and reveals how the lungs serve as the body's first line of defence. She provides a timely overview of the latest scientific thinking about the leading respiratory risks-including indoor and outdoor pollution, smoking and vaping, wildfire smoke and viruses like SARS-CoV-2-and offers a practical guide to keeping lungs healthy. With authority as both practitioner and medical researcher, she argues powerfully for a social policy that makes a priority of preserving lung health nationwide.

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