It has long been known that inhalation of asbestos fibers leads to many severe, often chronic illnesses. These ailments can be serious: respiratory illnesses, such as asbestosis, lung cancer, and mesothelioma are among some of the most widely reported. Mesothelioma is a rare and often deadly form of lung cancer that has been linked directly to asbestos exposure. There are a host of separate health concerns, including asbestos warts, pleural plaques, and pleural thickening. Pleural thickening refers to the appearance of widespread scarring along the lining of the lungs, and is often seen in mesothelioma patients who have been exposed to asbestos fibers. This exposure often comes from individuals working in close proximity to asbestos; this happens either directly, such as in professions like mining, or indirectly through products containing asbestos. Indirect exposure occurs in industries like those involved in either the manufacture or production of building materials, especially insulation, roofing tiles, Heating, Ventilating, and Air Conditiong (HVAC), and flame-retardant materials.
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