Cudurka halista ah ee neef-mareenka coronavirus 2 (SARS-CoV-2), cudur-sidaha keena cudurka coronavirus ee ugu dambeeyay 2019 (COVID-19), waa fayraska RNA-ga ee dareen-togan, oo leh cabbir genome ah oo ku dhow 30kb .Noocyo badan oo SARS-CoV-2 ah oo leh saxiixyo is beddel ah oo kala duwan ayaa soo baxay inta lagu jiro cudurka faafa.Iyada oo ku xidhan muuqaalkooda is-beddelka borotiinka, kala duwanaanshiyaha qaar ayaa muujiyay gudbinta sare, caabuqa, iyo fayraska.

Qabiilka BA.2.86 ee SARS-CoV-2, oo markii ugu horreysay la aqoonsaday Agoosto 2023, ayaa si dabiici ah uga duwan tafiirta Omicron XBB ee hadda wareegaysa, oo ay ku jiraan EG.5.1 iyo HK.3.Nasabka BA.2.86 waxa uu ka kooban yahay in ka badan 30 beddelaad oo borotiinka taranka ah, taas oo tusinaysa in nasabkani uu aad awood ugu leeyahay in uu ka baxsado difaaca ka-hortagga-SARS-CoV-2 ee hore u jiray.

JN.1 (BA.2.86.1.1) waa kala duwanaanshaha ugu dambeeyay ee SARS-CoV-2 ee ka soo degay BA.2.86.JN.1 wuxuu ka kooban yahay isu beddelka L455S ee borotiinka sare iyo saddex isbeddellada kale ee borotiinnada aan-sikel ahayn.Daraasadaha lagu baarayo HK.3 iyo noocyada kale ee "FLip" waxay muujiyeen in helitaanka isbeddelka L455F ee borotiinka sare ee borotiinka ay la xiriirto kororka gudbinta fayraska iyo awoodda difaaca jirka.Isbeddellada L455F iyo F456L ayaa lagu naaneystaa "leexo”isbeddellada sababtoo ah waxay beddelaan booska laba amino acids, oo lagu calaamadiyay F iyo L, borotiinka sare.

We baysen medical waxa ay siin kartaa covid-19 is tijaabinta guriga, ku soo dhawaada nala soo xidhiidh wixii tafaasiil ah.