* Thus far, the full sequencing of ALL genomes has not been completed. The alterations described are deletions or amplifications of genes. Detailed sequencing may reveal an increase in the number of mutated genes.

* Mice filter out many of the carcinogenic components of tar. Asbestos incites cancer by inducing a scar-forming, inflammatory reaction in the body. Bacteria don’t generate this reaction and are thus “immune” to asbestos.