Ah, I see. I touched on this a bit in another comment but there's more factors than lethality at play. If a virus makes you sufficiently symptomatic you're muc

Ah, I see. I touched on this a bit in another comment but there's more factors than lethality at play. If a virus makes you sufficiently symptomatic you're much more likely to isolate. Conversely if it remains completely asymptomatic you will spread very little. So they're targeting a sweet spot of symptomaticity. You can very easily imagine a strain that would lead to the sweet spot of symptomaticity in a vaccinated person, which therefore would tend to "overshoot" and be excessively pathogenic in an equivalent unvaccinated individual. In fact, this is a bit of a tangent, but I suspect part of the reason the vaccinated are spreading Delta so much, is that it causes normal cold symptoms in them (which btw the original SARS-2 did too despite how people would act like it's way different); and imo because the media and the "expert" class has so sufficiently scared them that SARS-2 is this scary supervirus, they assume their run-of-the-mill cold symptoms can't be COVID and keep engaging in society without getting tested or anything * As very circumstantial evidence of the above hypothesis, I would point to https://www.nejm.org/doi/full/10.1056/NEJMc2009787 https://www.nejm.org/doi/full/10.1056/NEJMc2009787. This was before vaccination but it's a case report of people who actually had SARS-2 (if we can trust PCR; given the symptoms I think in this case they really did have it), and indeed had COVID (+ pre-existing risk factors) bad enough that they ended up developing strokes. And yet even though these were actual covid patients who eventually developed strokes: > "Social distancing, isolation, and reluctance to present to the hospital may contribute to poor outcomes. Two patients in our series delayed calling an ambulance because they were concerned about going to a hospital during the pandemic." So my interpretation of the above (this is me reading between the lines) is that even though they felt like shit, they thought actual COVID was even worse than that and thus avoided going to the hospital so they wouldn't catch COVID, not knowing that they already had it... * Note I don't necessarily think this (unintentional spread) is even a bad thing, I am firmly on the side of "SARS-CoV-2 will propagate through the population no matter what we do and the more we flail about and needlessly damage ourselves the worse it will be". But from the perspective of the average vaccinated person, they are probably very against the concept of spreading it and thus if they were aware that their "cold" was really SARS-2 they'd act way differently