Tracking Omicron and Other Coronavirus Variants (Updated April 3, 2022)
On Nov. 26, the World Health Organization named the Omicron variant a new variant of concern. The variant was first identified in South Africa and Botswana, and has been detected in at least 110 nations. It is spreading rapidly in several countries, including Britain, Denmark and Norway, but researchers have yet to determine if it is truly more contagious than other variants.

Omicron: The B.1.1.529 Lineage
On Nov. 26, the World Health Organization named the Omicron variant a new variant of concern.
The variant was first identified in South Africa and Botswana, and has been detected in more than 165 nations. In the United States, the variant has been detected in all 50 states and in Washington, D.C.
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