"Before the arrival of powerful anti-HIV drugs, AIDS took such a heavy toll in one region of South Africa that, in just over a decade, it left a mark on the human genome, changing the frequency of immune-system genes, a new study shows."
https://www.science.org/content/article/how-hiv-aids-tragedy-spurred-human-evolution?utm_medium=email&utm_source=1440&utm_campaign=1440&user_id=66c4c92f5d78644b3ac5d5b4
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