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In some cases, the cause of pulmonary alveolar proteinosis is unknown. In others, it is associated with infection or immune deficiency.This rare disorder generally affects people 30- 50 years old and is seen in men more often than in women.
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The cause of this disease is unknown. In some people, however, it appears to result from infection, immune deficiency, or from exposure to silica, aluminum oxide, and a variety of dusts and fumes.
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