Actually it's exactly how it works. H1N1 was novel but now it's not. When it first hit, its deadliness was high but not anymore, even as it mutates, which is at

Actually it's exactly how it works. H1N1 was novel but now it's not. When it first hit, its deadliness was high but not anymore, even as it mutates, which is at a faster rate than SARS-CoV-2. I suggest you read up on "sterilizing immunity". People with immunity against COVID still can transmit the virus. This was already known so it's nothing new. There are some viruses that we have sterilizing immunity against, like smallpox. There are other diseases like tuberculosis, COVID, etc where immune people still shed the virus. And you can't stop the rate of mutation because animals can get and transmit SARS-CoV-2. So it doesn't matter if all humans were immune, animals could still get infected and cause mutations that re-enter the human population.