AIDS Virus Might Be A Million Years Old

Island-specific strains of the simian immunodeficiency virus (SIV), which infects monkeys such as the Bioko Drill, revealed the virus has been around thousands of years longer than previously thought. Credit: Preston Marx, Tulane University

From Cosmos:

WASHINGTON: An HIV-like virus that infects monkeys is thousands of years older than previously thought and its slow evolution could have disturbing implications for humans, according to a new study.

Scientists said the simian immunodeficiency virus (SIV) - the ancestor to the human immunodeficiency virus (HIV) that causes AIDS - is probably between 32,000 and 75,000 years old and may even date back a million years.

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