Influenza flu an infection by one or more flu viruses

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Influenza (flu): An infection by one or more flu viruses causes fever, body aches, and coughing lasting a week or more. Influenza can progress to life-threatening pneumonia, especially in older people with medical problems. Mesothelioma : A rare form of cancer that forms from the cells lining various organs of the body with the lungs being the most common. Mesothelioma tends to emerge several decades after asbestos exposure. Pertussis ( whooping cough ): A highly contagious infection of the airways (bronchi) by Bordetella pertussis, causing persistent cough. A booster vaccine (Tdap) is recommended for adolescents and adults to prevent pertussis. Pulmonary hypertension : Many conditions can lead to high blood pressure in the arteries leading from the heart to the lungs. If no cause can be identified, the condition is called idiopathic pulmonary arterial hypertension . Pulmonary embolism : A blood clot (usually from a vein in the leg) may break off and travel to the heart, which pumps the clot (embolus) into the lungs. Sudden shortness of breath is the most common symptom of a pulmonary embolism. Severe acute respiratory syndrome ( SARS ): A severe pneumonia caused by a specific virus first discovered in Asia in 2002. Worldwide prevention measures seem to have controlled SARS, which has caused no deaths in the U.S. Pneumothorax : Air in the chest; it occurs when air enters the area around the lung (the pleural space) abnormally. Pneumothorax can be caused by an injury or may happen spontaneously.
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