It could have come from a person who was carrying both delta and omicron.
combination
of the delta and omicron variants, with a spike protein that’s extremely close to omicron’s and the rest of its genome coming from delta. It could have come from a person who was carrying both delta and omicron; the viruses could have combined in an infected cell, and then that product could have continued to replicate in the infected person.Viral recombination is to be expected—especially when this virus has gotten to infect so many people. But the phenomenon doesn’t necessarily spell disaster.
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