The World Health Organization (WHO) this week boosted the XBB.1.16 Omicron subvariant to a variant of interest (VOI) from a variant under monitoring (VUM), based on the latest assessments from its technical advisory group on virus evolution.
The subvariant is fueling India's biggest surge in about 7 months, and the US Centers for Disease Control and Prevention (CDC) reported another jump in the proportion of XBB.1.16 viruses.
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