what do you think about next Mutant strain of covid?

※you can choose languages. from the sidebar or lower part.

this day, the covid-19 virus is spreading now. and that virus has many mutant strains...

image from here

And they have each name. 

as you know it comes from math symbols.

so, I think the next mutant strain will come soon.

then, What do you think about the next name??

I think it's "sigma". :)