That would be interesting and helpful to know. I think I read somewhere- I'm not positive-- but, I think the idea of 'natural immunity not working' was part of the scenario-planning of the pandemic tabletop exercise of Event201. Since the US seems to be only nation stupid enough to weave this thread into it's ongoing narrative, there must have been a lot of discursive work done to maintain the lie. Who wrote that script? And, are there any other countries that don't recognize natural immunity?