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When is a COVID mutation a new variant, and when is it a subvariant? What’s a recombinant?
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When is a COVID mutation a new variant, and when is it a subvariant? What’s a recombinant?

by Paul Griffin, The Conversation Credit: Shutterstock We’ve all become familiar with virus mutations over the course of the pandemic, and can all probably list off the COVID variants including alpha, delta and omicron. But now we’re hearing more and more about subvariants, as omicron mutates into omicron BA.2, omicron BA.4, omicron XE, and more....