What are the Health Effects of Asbestos Exposure?

Exposure to airborne friable asbestos may result in a potential health risk because persons breathing the air may breathe in asbestos fibers.  Continued exposure can increase the amount of fibers that remain in the lung.  Fibers embedded in lung tissue over time may cause serious lung diseases including: asbestosis, lung cancer, or mesothelioma.  The risk of lung cancer and mesothelioma increases with the number of fibers inhaled.  The risk of lung cancer from inhaling asbestos fibers is also greater if you smoke.  Smoking increases the risk of developing illness from asbestos exposure.  People who get asbestosis have usually been exposed to high levels of asbestos for a long time.  The symptoms of these diseases do not usually appear until about 20 to 30 years after the first exposure to asbestos.  Most people exposed to small amounts of asbestos, as we all are in our daily lives, do not develop these health problems.  However, if disturbed, asbestos material may release asbestos fibers, which can be inhaled into the lungs.  The fibers can remain there for a long time, increasing the risk of disease.  Asbestos material that would crumble easily if handled, or that has been sawed, scraped, or sanded into a powder, is more likely to create a health hazard.  If you are concerned about possible exposure, consult a physician who specializes in lung diseases (pulmonologist). 
Three of the major health effects associated with asbestos exposure include:  
Asbestosis – Asbestosis is a serious, progressive, long-term non-cancer disease of the lungs.  It is caused by inhaling asbestos fibers that irritate lung tissues and cause the tissues to scar.  The scarring makes it hard for oxygen to get into the blood. Symptoms of asbestosis include shortness of breath and a dry, crackling sound in the lungs while inhaling.  There is no effective treatment for asbestosis.
Lung Cancer – Lung cancer causes the largest number of deaths related to asbestos exposure.  People who work in the mining, milling, manufacturing of asbestos, and those who use asbestos and its products are more likely to develop lung cancer than the general population.  The most common symptoms of lung cancer are coughing and a change in breathing.  Other symptoms include shortness of breath, persistent chest pains, hoarseness, and anemia.
Mesothelioma – Mesothelioma is a rare form of cancer that is found in the thin lining (membrane) of the lung, chest, abdomen, and heart and almost all cases are linked to exposure to asbestos.  This disease may not show up until many years after asbestos exposure.  This is why great efforts are being made to prevent school children from being exposed.