A collapsed lung (pneumothorax) is a buildup of air in the space between the lung and the chest wall (pleural space). As the amount of air in this space increases, the pressure against the lung causes the lung to collapse. This prevents your lung from expanding properly when you try to breathe in, causing shortness of breath and chest pain.
A pneumothorax may become life-threatening if the pressure in your chest prevents the lungs from getting enough oxygen into the blood.
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Legionnaires’ Disease is a severe form of pneumonia that sickens about 5,000 people in the U.S. each year. It’s caused by the bacterium Legionella pneumophila.
Scientists first identified it in 1977. That was 6 months after a mysterious outbreak sickened 180 and claimed the lives of 29 people attending an American Legion convention at a Philadelphia hotel.