<human>:  Where did the sars virus come from?
<bot>: The sars virus is a RNA virus that was first identified in the late 1970s. It is a member of the genus reovirus, which includes the sars virus, syncytiotrophomonas, and ebola viruses. The sars virus is a zoonotic virus that is transmitted from animals to humans. It is believed to have originated in bats, and then spread to humans through contact with infected animals.