Despite high homology between these two viruses, it is generally believed that WIV1 is not the immediate relative of SARS-CoV and that bats are not the immediate reservoir host of SARS-CoV.
Wagonjwa wachache pekee ambao kinga zao za mwili ni dhaifu ndio walioonyesha maambukizi kali ya sehemu ya chini ya njia ya kupumua.