‘Stealth’ Omicron Sub-Variant Detected In 57 Countries, WHO Says

Topline The mutated version of the omicron Covid variant—known as BA.2 and termed “stealth omicron” by some scientists—has been found in 57 countries, according to the World Health Organization, which said early data indicates it is more infectious than other versions of omicron. Key Facts Over the last six weeks, the BA.2 subvariant has overtaken…
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