Boris Johnson will lead a Downing Street press conference at 5pm, No 10 has revealed.
The Prime Minister will be joined by England's chief medical officer Sir Chris Whitty and chief scientific adviser Sir Patrick Vallance.
It comes as World Health Organisation (WHO) official said more evidence is emerging that the Omicron Covid variant causes milder symptoms than previous strains.
WHO Incident Manager Abdi Mahamud said that “more studies” were “pointing out that Omicron is infecting the upper part of the body” and not causing severe disease such as pneumonia.
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