New Covid-19 variant Orthrus accounts for around one-quarter of all cases in England, data shows.
The sub-lineage of the Omicron variant, known as CH.1.1, is one of the most likely to take over from currently dominant BQ.1, according to the UK Health Security Agency (UKHSA).
Since the first cases of the new variant emerged in November it spread to account for 23.1 per cent of all cases in England by 1 January, the latest UKHSA figures show – though sequencing suggests it could make up as much as 100 per cent in some areas.
The figures for that week suggest Orthrus accounted for around 8,700 cases, though officials warn variant estimates are uncertain.
Orthrus, along with the Kraken, or XBB.1.5, variant are thought to be moving towards dominance in Britain – though neither have been classed as being "of concern".
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