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Asbestos exposure and risks of mesothelioma
Asbestos is made up of microscopic bundles of fibers that may become airborne when distrubuted. These fibers get into the air and may become inhaled into the lungs where they may cause significant health problems. Researchers have not agreed on what constitutes a "safe level" of exposure, but the dangers of prolonged exposure are well known, and increase over time.

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mesothelioma - mesothelioma-aid.org