'Kraken' strain sweeps UK as ministers fight back against clamour for new restrictions
World Health Organisation warns XBB.1.5 is the 'most transmissible' Covid variant yet The latest subvariant - another spinoff of Omicron officially named XBB.1.5 - has already taken hold in the US where it is thought to be behind roughly 70 per cent of new infections in the worst affected areas and 4 in 10 overall. Now it has started to sweep across the UK, indicating it has a major growth advantage over rival strains. Dr. Maria Van Kerkhove, WHO's technical lead for Covid (top), told a press conference Wednesday: 'We are concerned about its growth advantage in particular in countries in Europe and the US'. Data from GISAID and CoVariants.org (right) suggests that XBB.1.5 was responsible for just under 8 per cent of cases in the UK two weeks to January 2. But the latest figures from the Sanger Institute, one of the UK's largest Covid surveillance centres, suggests XBB.1.5 is behind up to half of all Covid cases in the worst-hit regions (bottom right). The Sanger Institute's research shows 50 per cent of cases in Wirral last week were caused by the 'Kraken'. XBB.1.5 has also been detected in countries including France, Germany, the Netherlands, Spain, Ireland, Australia, Singapore and India (graphic of Covid molecule inset).
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