This Practice Note deals with the different types of asbestos, methods of exposure and the main asbestos-related diseases. It also looks at the development of therapies such as immunotherapy for the treatment of mesothelioma, the recoverability of the cost of such treatments and the use of periodical payments orders. Practical guidance is also provided in relation to obtaining medical evidence. It is essential for those pursuing personal injury claims on behalf of claimants who have contracted disease as a result of exposure to asbestos to have an understanding about the nature of the substance and the serious, often terminal, medical conditions that can be suffered by those exposed to it. Types of asbestos Asbestos is the generic term used for a group of six naturally occurring silicate minerals composed of long, thin, fibrous crystals. In the 1970s and the 1980s, asbestos was extensively mined in a number of countries around the world, with the leading producers being Canada and South Africa. Asbestos, in its various forms, was very commonly used in industry and in construction until