The latest guess, and it is a guess because our public health intelligentsia deeply suck at their jobs, is that 1/3 of Americans immune systems encountered SARS-COV2 last year. This year the very fit Delta version is on a romp. We might be reasonably close to something good. On the other hand it is now clear that this bug will, if it has not already, completely evade the current so called vaccines, making them useless.
that what you really think? Wow. I cannot imagine how you got there unless you wanted to so badly. Self-delusion in a pandemic is dangerous.