Evidence indicates that HIV-1 and HIV-2 originated in non-human primates, and only made the jump to infecting humans in the early twentieth century. As a consequence, these viruses are not well adapted to co-exist in equilibrium with their human hosts.

Question

Quizplus · Accepted Answer

HIV-1 and HIV-2 originated in non-human primates and only recently crossed over to infect humans, which means they are not well adapted to co-exist in equilibrium with their human hosts.

Evidence Indicates That HIV-1 and HIV-2 Originated in Non-Human Primates