Why is asbestos dangerous? Asbestos has been declared a known carcinogen and has been associated with several types of cancer, including mesothelioma. Asbestos accounts for 54% of all occupational cancers in the U.S. although its use was discontinued over 30 years ago. Since 1979, 43,000 people have died of asbestos-related illnesses. (2007) By ProMatcher Staff Updated: 08/08/2016 Next Question Source: Office of Compliance Next Question Find Local Pros Free Actuaries Cost Estimates Related Questions How many injuries involve vacuum cleaners? How Many Forklift Injuries Occur Each Year? How many people are killed by wood chippers? How many flooring-related injuries occur each year? How many home fires occur each year?