There is a very small risk to human health if asbestos is not damaged. However, if asbestos containing products become damaged, the fibres may be released into the air. People who work with asbestos or with asbestos-containing products may be exposed to higher levels of asbestos fibres in air.
Breathing in high concentrations of asbestos for a long period of time (often known as life-time exposure) can adversely affect the lungs and may cause a disease called asbestosis. Asbestosis results in heart problems and breathing difficulties. It is also possible to develop lung cancer as a result because asbestos is classified as a human carcinogen and there is no absolutely safe level.
People breathing in lower concentrations, over a long period, may develop pleural plaques or mesothelioma.