LOS ANGELES, April 21 (Xinhua) -- A new Omicron subvariant is spreading in the United States, and has accounted for nearly 10 percent of new weekly COVID-19 cases reported across the country, according to data updated Friday by the U.S. Centers for Disease Control and Prevention (CDC).
The subvariant XBB.1.16, referred to as "arcturus", has been added by the CDC to its variant tracker. The percentage is expected to increase in the coming weeks, and it may become the next dominant coronavirus strain in the country, experts warned.
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