Sunacovirus, also known as Suncus murinus coronavirus X74, Xëngguà Â-74, or the Wénchéng shrew virus (WESV), is a subgenus of viruses in the genus Alphacoronavirus, consisting of a single species, Alphacoronavirus sunci. It was first described in 2017 by Wen Wang and colleagues, when it was discovered infecting a population of Asian house shrews.