Omicron Is WHO’s Fifth Variant of Concern, Experts Urge Patience

Preliminary data suggest that the newly dubbed Omicron variant may be more infectious than previous versions of the virus, but it will take time to obtain the reliable data needed to answer pressing questions about its biology.

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Artist’s renderings of SARS-CoV-2 float in front of a map showing the origins of various variants of the virus.

The Omicron variant of SARS-CoV-2 was recently identified by scientists in South Africa.

MODIFIED FROM © ISTOCK.COM, CROCOTHERY

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On Tuesday, November 23, scientists in South Africa alerted the world to a new variant of SARS-CoV-2, the virus that causes COVID-19. Officially named the B.1.1.529 variant, it has been dubbed Omicron as part of the World Health Organization (WHO)’s Greek naming system, and has put health officials and researchers around the world on high alert as they make sense of its potential implications for the ongoing global pandemic.

In addition to South Africa, the new variant has been detected in at least 15 countries in Africa, Europe, and North America, according to CNN, prompting myriad restrictions on international travel. The variant is likely already present in additional countries, including the United States, The Wall Street Journal reports.

WHO Director-General Tedros Adhanom Ghebreyesus describes the Omicron variant as “perilous and precarious,” according to Reuters. It’s too soon to tell whether Omicron will continue to spread internationally or if it will ...

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  • black and white image of young man in sunglasses with trees in background

    Dan Robitzski

    Dan is a News Editor at The Scientist. He writes and edits for the news desk and oversees the “The Literature” and “Modus Operandi” sections of the monthly TS Digest and quarterly print magazine. He has a background in neuroscience and earned his master's in science journalism at New York University.
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