You said: "Some people do survive, that we know. What I haven't seen is whether that has been due to some “natural immunity” or whether those people just have super immune system responses to viruses."
So, I guess we have to define "immunity". If you define immunity as "..people do survive" then the immunity rate is as high as 50% and as low as 10% for some strains. That we know too.
That’s just for this particular strain. And that is not the question I asked.
The issue was for any given virus, is it accurate to state that a certain amount of people will always have a natural immunity to it. And given that seems to be your assertion, I asked if there was any scientific studies that had been done to support that thesis.
Given your reply, I take it that you know of none. That’s too bad, it would have been worth reading about. Thanks any way.