Expert: COVID sub-variant XBB.1.5 is highly infectious

The Omicron sub-variant XBB.1.5 has rapidly spread to become the dominant COVID-19 mutation in the U.S., accounting for over 40 percent of all cases last week in the country. Dr. Alice Hyun-Kyung Tan, a doctor at the MizMedi Women's Hospital in Seoul, says that the high-risk group needs to be precautious of the highly infectious sub-variant XBB.1.5.

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