February 27, 2022
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New studies of the BA.2 sub-variant of the omicron strain of COVID — known as “stealth” omicron — show that the lineage is more transmissible than the original omicron, but may not be more severe. And so far, it doesn’t seem to be provoking another surge in cases.
While experts are keeping a close eye on BA.2 as it circulates around the world — it is already in all 50 U.S. states — many aren’t worried that it will upend recent progress in winding down the pandemic.