Denne variant blev først identificeret i [[Indien]] 5. oktober 2020<ref name="SMC1">{{cite web |title=Expert reaction to cases of variant B.1.617 (the ‘Indian variant’) being investigated in the UK |url=https://www.sciencemediacentre.org/expert-reaction-to-cases-of-variant-b-1-617-the-indian-variant-being-investigated-in-the-uk/ |website=Science Media Centre |publisher=Science Media Centre |access-date=20. april 2021}}</ref>
og er blevet betegnet som en "dobbeltmutationsvariant."<ref name="Pango" /><ref name="The Hindu">{{cite news |last1=Koshy |first1=Jacob |title=Coronavirus {{!}} Indian 'double mutant' strain named B.1.617 |url=https://www.thehindu.com/news/national/indian-double-mutant-strain-named-b1617/article34274663.ece/amp/ |work=The Hindu |date=8. april 2021 |language=en-IN|access-date=2021-04-19|quote=''Though these mutations have individually been found in several other coronavirus variants, the presence of both these mutations together have been first found in some coronavirus genomes from India.''}}</ref><ref>{{cite news |last=Cuff |first=Madeleine |date=19. april 2021 |title=Indian variant: Cases of new 'double mutation' Covid strain thought to be spreading in UK |url=https://inews.co.uk/news/health/indian-variant-cases-covid-strain-double-mutation-spreading-rapidly-uk-962334 |work=[[i (newspaper)|i]] |location=London |access-date=2021-04-20}}</ref>
Betegnelsen 'dobbeltmutation' henviser til mutationerne hos B.1.617 − til de kodende sekvenser i positionerne 484 og 452 (E484Q og L452R) i [[spike-protein]]et.<ref>{{cite journal |last1=Shang |first1=Jian  |last2=Yushun |first2=Wan |last3=Lou |first3=Chuming |last4=Ye |first4=Gang |last5=Geng |first5=Qibin |last6=Auerbach |first6=Ashley |last7=Fang |first7=Li |date=2020 |title=Cell entry mechanisms of SARS-CoV-2 |url= |journal=Proceedings of the National Academy of Sciences |volume=117 |issue=21 |pages=11727–11734 |doi=10.1073/pnas.2003138117 |doi-access=free |access-date=}}</ref><ref name=SGDB>{{cite journal |last1=Starr |first1=Tyler N. |last2=Greaney |first2=Allison J. |last3=Dingens |first3=Adam S. |last4=Bloom |first4=Jesse D. |title=Complete map of SARS-CoV-2 RBD mutations that escape the monoclonal antibody LY-CoV555 and its cocktail with LY-CoV016 |journal=Cell Reports Medicine |date=april 2021 |pages=100255 |doi=10.1016/j.xcrm.2021.100255 |doi-access=free |access-date=}}</ref><ref group=note>Små opslag om mutationerne [[:no:Mutasjon E484Q|E484Q]] og [[:no:Mutasjon L452R|L452R]] {{no sprog}} </ref>
Historie Vira