Yeah, a paper would be nice. Like, let's say that natural immunity acquired from exposure to baseline SARS-CoV-2 meant that 99% of your population wouldn't die

Yeah, a paper would be nice. Like, let's say that natural immunity acquired from exposure to baseline SARS-CoV-2 meant that 99% of your population wouldn't die when other variants came through. Would the deaths from the baseline virus be worth the protection conveyed against the other variants? What _is_ the effectiveness of natural immunity from baseline Covid against Delta or Omicron? There must be some research, surely.