Bambancin Eta wani nau'in SARS-CoV-2, kwayar cutar da ke haifar da COVID-19 . Bambancin Eta ko jinsi B.1.525, wanda kuma ake kira VUI -21FEB-03 (a baya VUI-202102/03 ) ta Public Health England (PHE) kuma wacce aka fi sani da UK1188, 21D ko 20A/S: 484K, baya ɗaukar guda ɗaya Canjin N501Y da aka samu a cikin Alpha, Beta da Gamma, amma yana ɗauke da maye gurbin E484K ɗaya kamar yadda aka samu a cikin bambance-bambancen Gamma, Zeta, da Beta, kuma yana ɗauke da ΔH69/ΔV70 iri ɗaya (sharewar amino acid histidine da valine a matsayi 69 da 70) kamar yadda aka samo a cikin Alpha, N439K bambance -bambancen (B.1.141 da B.1.258) da bambance -bambancen Y453F ( Cluster 5 ). Eta ya bambanta da duk sauran bambance-bambancen ta hanyar samun duka E484K-maye gurbi da sabon maye gurbin F888L (maye gurbin phenylalanine (F) tare da leucine (L) a cikin yankin S2 na furotin mai haɓaka ). Tun daga 5 ga Maris 2021, an gano ta a cikin ƙasashe 23.