If HIV had been or become an airborne virus when it entered the human population in the early 1900s, there's a pretty good chance it would have been an extincti

If HIV had been or become an airborne virus when it entered the human population in the early 1900s, there's a pretty good chance it would have been an extinction event for the human race. I suppose there might have been a few isolated pockets of humans left in 2026, but I would not personally ever use the words "good news" to describe an outcome that reduces the human population to a few thousand people.