English to Russian Medical Medical (general)

Steve O'Brien, head of the Laboratory of Genomic Diversity at the National Cancer Institute and proponent of the plague selection hypothesis, who was not involved in the study, told The Scientist, “Something in the past started killing millions of people, and that thing, whatever it was, was probably slowed down in people who carried CCR5 [mutation in] either one or two copies, and that slowing down probably allowed that gene to rise up in frequency, not once but many times over the last few thousand years.”