Editing Virus classification (section)

=== Below species rank (named viruses/virus strains/isolates) ===
Many individually named ''viruses'' (sometimes referred to as "virus strains") exist at below the rank of virus ''species''. The ICVCN gives the examples of blackeye cowpea mosaic virus and peanut stripe virus, which are both classified in the species ''[[Bean common mosaic virus]]'', the latter a member of the genus ''[[Potyvirus]]'' that will in due course receive a binomial name as ''Potyvirus [species...]''. As another example, the virus [[SARS-CoV-1]], that causes severe acute respiratory syndrome ([[SARS]]) is different from the virus [[SARS-CoV-2]], the cause of the [[COVID-19]] pandemic, but both are classified within the same virus species, a member of the genus ''[[Betacoronavirus]]'' that is currently known as ''[[Severe acute respiratory syndrome-related coronavirus]]'' which, per the 2021 mandate from the ICTV, will also receive a binomial name in due course. As set out in the ICVCN, section 3.4, the names [and definitions] of taxa below the rank of species are not governed by the ICTV; "Naming of such entities is not the responsibility of the ICTV but of international specialty groups. It is the responsibility of ICTV Study Groups to consider how these entities may best be classified into species."<ref name=ictvcode /> Using the example given above, the virus causing the COVID-19 pandemic was given the designation "SARS-CoV-2" by the ''Coronaviridae'' Study Group (CSG) of the International Committee on Taxonomy of Viruses in 2020; in the same publication, this Study Group recommended a naming convention for particular isolates of this virus "resembl[ing] the formats used for isolates of avian coronaviruses, filoviruses and influenza virus" in the format virus/host/location/isolate/date, with a cited example as "SARS-CoV-2/human/Wuhan/X1/2019".<ref>{{cite journal |author=Coronaviridae Study Group of the International Committee on Taxonomy of Viruses |title=The species Severe acute respiratory syndrome-related coronavirus: classifying 2019-nCoV and naming it SARS-CoV-2 |journal=Nature Microbiology |volume=5 |issue=4 |pages=536–544 |date=April 2020 |pmid=32123347 |pmc=7095448 |doi=10.1038/s41564-020-0695-z}}</ref>