Again: Viruses do not necessarily evolve to be milder—especially if they transmit early, like this one. Our immune system learning about it—via vaccines or infection—can mean better response next time, so milder experience. Not same as virus becoming intrinsically less virulent.https://twitter.com/zeynep/status/1465075561236250631 …
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As far as I read it was merely the amount of transmission and number of infected hosts that resulted in the higher death count, not that it was more lethal overall. And, how are they reading that data and the cut-off between the two? Are we confident in the numbers?
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https://www.cmaj.ca/content/193/42/E1619 … (Delta has 235% higher risk of ICU admission compared to original strain)
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