It has to do with AEC2 bonding affinity and yes Europeans are the highest level of affinity and Askenazi are lowest level of affinity. Hurr durr "COVID doesn't exist" sure; but that is what the lab was developing with HIV inserts that allow for no durable immunity, ever.
They could have also been working on a strain to target asians because of the lack of biodiversity along the AEC2 in east asian populations
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