Infectious inflammation of the lungs, in which fluid accumulates in the alveoli; the eighth most common cause of death in the United States.Most of the more than 50 different varieties of pneumonia are viral or bacterial
Infectious inflammation of the lungs, in which fluid accumulates in the alveoli; the eighth most common cause of death in the United States.Most of the more than 50 different varieties of pneumonia are viral or bacterial
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