It was given the “stealth” nickname because it looks like the earlier delta variant on certain PCR tests, says Kristen Coleman at the University of Maryland School of Public Health. The original omicron, by contrast, is easy to differentiate from delta because of a genetic quirk.
In rare cases, early research indicates BA.2 can infect people even if they’ve already had an omicron infection. COVID-19 vaccines appear just as effective against both kinds of omicron, offering strong protection against severe illness and death. Health officials also are tracking other variants including XE — a combination of BA.2 and BA.1, the original omicron — that was first identified in January in the United Kingdom. The World Health Organization is keeping tabs on XE but has not yet deemed it a variant of concern or interest.
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COVID vaccine plus infection can lead to months of immunityFindings from Brazil, Sweden and the United Kingdom show that before the advent of Omicron, vaccination benefited even those who had had a bout of COVID-19. Get infected so you don’t get infected. Got it. Ciência inspirado em hospício. Mudam a narrativa conforme as consequências aparecem. 👀👀
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