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That's untrue. Viruses which spillover may spread across humans at a low level of efficiency for months, mutating for higher affinity towards humans, and only b
by sudosysgen 3y ago
That's untrue. Viruses which spillover may spread across humans at a low level of efficiency for months, mutating for higher affinity towards humans, and only becoming pandemic once a high level of affinity has been achieved.
All viruses which have higher affinity for humans spilled over, didn't they?
- raccoondogs 3y agoThat's what happened with H1N1 but we know that hasn't happened with Sars2 because Sars2 only spreads efficiently with a furin cleavage site but the furin cleavage site also makes it more pathogenic so it would definitely not spread undetected.
- sudosysgen 3y agoStudies have found that people living near bats in Yunnan have immunity against this class of coronaviruses due to exposure, which would strongly blunt pathogenicity. There is also more to pathogenicity than you let on.