[inglor_cz]

My old friend with no history of asbestos exposure, a sysadmin no less, died of mesothelioma last year. I only learnt that yesterday. (We grew apart...)

I spent an hour reading about that cancer. It seems that mesotheliomas without previous known asbestos exposure do occur.

[MichaelZuo]

Maybe he worked with fiberglass? I've heard a lot of things are similar to asbestos, they just need a higher exposure to do the same damage.