Concerns over new, highly contagious COVID-19 sub-variant

The World Health Organisation (WHO) is keeping tabs on the new omicron sub-variant XBB.1.16, dubbed “Arcturus” by those tracking the virus. XBB.1.16 is currently fueling a surge of cases in India, where it is the dominant sub-variant, and has been identified in, at least, 22 countries, including the United States.