2022.
To some extent everything is a mutation. The bacteria y pestis did not occur on Earth as a separate entity. It came from some other bacteria that had some change occur to it. And Y pestis for those who don’t know is the bacteria that causes bubonic plague and wiped out about half the population of the Earth. It would have been far more than that if it had reached Latin America.
So yes, mutations can be worse than the original.
There are many suspicious things about the covid virus. I think we all know that it very likely is an artificial virus created by the Chinese. Because it is artificial, it makes no sense to expect natural immunity to have power over it. It was designed to resist such things. It was also designed to mutate and dodge vaccines.
The only real question about its design is whether or not the Chinese discovered some difference in lung cells for Asians versus other nationalities or races. And designed accordingly. The deaths per million in Asian countries is a tiny fraction of the deaths per million elsewhere in the world caused by the virus. This is very suspicious.