What do we know about the new COVID subvariant?

SUQIAN, CHINA - JANUARY 4, 2023 - Illustration: XBB.1.5 strain, January 4, 2023, Suqian, Jiangsu, China. (Photo by CFOTO/Sipa USA) Credit: Costfoto/Sipa USA
Experts are warning Australians about a new Omicron strain of COVID called XBB.1.5, which has been labelled as the most transmissible subvariant so far
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