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XBB, BQ.1.1, BA.2.75.2 – a variant swarm could fuel a winter surge

Washington Post: “For two years, coronavirus variants emerged, one by one, sweeping the globe. But this fall and winter are expected to be different: Instead of a single ominous variant lurking on the horizon, experts are nervously eyeing a swarm of viruses and a new evolutionary phase in the pandemic. This time, it’s unlikely we will be barraged with a new collection of Greek alphabet variants. Instead, one or more of the multiple versions of the omicron variant that keep popping up could drive the next wave. They are different flavors of omicron, but eerily alike — adorned with a similar combination of mutations. Each new subvariant seems to outdo the last in its ability to dodge immune defenses. “It is this constant evolutionary arms race we’re having with this virus,” said Jonathan Abraham, an assistant professor of microbiology at Harvard Medical School…”

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