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Dr Emma Hodcroft :verified:

I've updated my /#XBB figure to show how it has evolved into XBB.1 & XBB.1.5

XBB.1 has an additional spike S1 mutation at G252V
XBB.1.5 has a second amino-acid change at 486, taking 486S -> 486P

1/2

twitter.com/firefoxx66/status/