Most individuals that have developed mesothelioma have worked on jobs where they inhaled asbestos particles or had some exposure to asbestos dusts and fibers, which could have resulted from second-hand exposure while washing the clothes of a family member that works with asbestos or from home renovation cement products using asbestos.

This disease may take anywhere from 20-50 years from the original exposure to become symptomatic.
[Source: Wikipedia- Mesothelioma]