What to Know About XBB and Other Omicron Subvariants

Since emerging in late 2021, the highly transmissible omicron strain of SARS-CoV-2 has splintered into an expansive array of subvariants that are driving new waves of Covid-19 around the world. The proliferation of such a diversity of variants is unprecedented and pits numerous hyper-mutated iterations against each other in a race for dominance. That’s turbo-charged Covid, making it one of the fastest-spreading diseases known to humanity and further challenging pandemic-mitigation efforts in a g

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