Dr Susan Hopkins, the chief medical adviser at the UK Health Security Agency, told a select committee on Thursday that for Omicron the R value was between 3 and 5 in the UK and that the variant was spreading rapidly – doubling in size every two days.
Hopkins said data on the severity of Omicron would not be known for another fortnight. At least 250 patients would need to be admitted to hospital before there could be a statistical analysis of the disease, she said
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Source: The Guardian