Lawrence Young, a virologist at the University of Warwick, described omicron as “the most heavily mutated version of the virus we have seen,” including potentially worrying changes never before seen within the same virus.
In South Africa, Gauteng province — home to Pretoria and the country's largest city of Johannesburg — is the center of the new surge. So far, cases there appear to be mild, according to doctors, and hospital admissions have not spiked.
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