A study by the University of Cambridge has revealed that the coronavirus had undergone mutations at least twice, once when it migrated from bats to humans, and another time when it spread out of China to other parts of the world.

There are now 3 identified variants of coronavirus, A, B and C.
Sounds like our common flu, don't you think!

The Mainichi: https://mainichi.jp/english/articles/20200414/p2a/00m/0na/028000c