> ### Known genetic variants of SARS-CoV-2
>
> | Variant | First identified in | More contagious? | Ability to evade vaccine | CDC/WHO classification |
> |:--|:-:|:-:|:-:|:-:|
> | B.1.1.7 | United Kingdom | Yes | Minimal | Concern |
> | B.1.351 | South Africa | Yes | Moderate | Concern |
> | P.1 | Brazil | Yes | Moderate | Concern |
> | B.1.526 | New York | Unknown | Potentially | Interest |
> | B.1.525 | New York | Unknown | Potentially | Interest |
> | P.2 | Brazil | Unknown | Potentially | Interest |
> | B.1.427 | California | Yes | Moderate | Concern |
> | B.1.429 | California | Yes | Moderate | Concern |
> | P.3 | Philippines | Unknown | Unknown | Under investigation |
> | A.23.1 with E484K | England | Unknown | Unknown | Under investigation |
> | B.1.1.7 with E484K | England | Unknown | Unknown | Under investigation |
> | B.1.525 | England | Unknown | Unknown | Under investigation |
> | B1.1.318 | Unknown | Unknown | Unknown | Under investigation |
> | B1.324.1 with E383K | Unknown | Unknown | Unknown | Under investigation |
> | B.1.111 with E383K and 429S | Columbia | Unknown | Unknown | Unknown |
>
> Sources: Rappler.com, CDC.gov, Health.com, WHO Weekly Epidemiological Update, Public Health England

[Source](https://www.webmd.com/vaccines/covid-19-vaccine/news/20210330/where-do-covid-vaccines-stand-against-the-variants), [table as image][1]

The nomenclature seems to follow a hierarchical pattern.  What does the first letter and the subsequent numbers indicate?  Location of the mutation?


  [1]: https://i.stack.imgur.com/G2bgG.jpg