Seriously, think about it - we KNOW that COVID-19 kills ~0.65% of people it infects. We KNOW that it can shut down hospital systems with people suffering from serious disease We ALSO know that some people have entirely asymptomatic infections
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What does the potential for some people to have T-cell immunity mean in this context? Pretty much nothing at all!
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Sure, some people might not get severe disease BUT WE ALREADY KNEW THAT We also know that, despite any T-cell cross reactivity, COVID-19 is seriously dangerous to A LOT OF PEOPLE
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And the whole argument about how this impacts R0 is SO DUMB Think about it - we OBSERVED an R0 of 2.5-3 If 20-50% of the population is immune, that would actually push the R0 up MUCH HIGHER
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With an OBSERVED R0 of 3, and 50% of the population immune at the outset, the 'true' R0 would be above 6 which pushes the herd immunity threshold up waaaaay higher
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All of this boils down to the same fact: if the pandemic has been this bad despite 20-50% of people being immune then the immunity clearly doesn't make much difference to the population health challenges posed by COVID-19
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End of conversation
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The "but t-cells tho" is another shift of goalposts from people who are repeating the same message over & over: 1. "We've all had it before. Autumn 2019 if not earlier. Wait for AB tests to prove it" 2. AB show low %. "Well, we've all had it in March-April." 3. Low % - "T-cells"
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How about "T-cell response means we might enhance protection by controlled exposure of people to common cold"?
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