Asbestos is a disease of latency. Latency basically means that there's a time period between exposure and when you get diagnosed with mesothelioma or lung cancer. So asbestos is not the type of product or substance that you would breathe in today and get mesothelioma tomorrow. You need a certain amount of time between when you breathe asbestos in and when you get mesothelioma, and most authorities on this will tell you that you need at least 12 to 15 years, on the very low end. But it could be as many as 60 years or more from the time of exposure.