" Chimps could live to be fifty and more, but once they’d been infected with the AIDS virus or one strain or another of hepatitis or had electrodes implanted in their brains or cancerous cells injected into their organs, they were damaged goods, useless for further experiments, and could look forward to spending the rest of their years on this earth confined to cages, without stimulus, without love or even the most rudimentary kind of interaction with people or members of their own species, too valuable in terms of breeding and supply-and-demand to be euthanized. "

― T. Coraghessan Boyle , Talk to Me