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THE GENIUS OF CHARLES DARWIN -- ILLUSTRATED SCREENPLAY & SCREENCAP GALLERY |
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And it's not luck either.
The Canadian scientist Larry Gelmon
has studied the odds of survival.
[Larry Gelmon, Microbiologist] We knew the prevalence of HIV in the sex-worker population.
We knew the prevalence in the clients
that they were dealing with.
We knew how often they were having sex with these people.
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