They are questions that have cast a shadow over the festive season, and if new Covid measures are needed, when and what form will they take?
The Scientific Advisory Group for Emergencies has said that peak admissions could be comparable with or even greater than previous highs without significant behavior change or further interventions, but many Conservative backbenchers argue that the public should be allowed to make their own decisions on the risks.
The health secretary, Sajid Javid, urged the public to remain cautious and to keep indoor spaces well ventilated, after it was confirmed on Monday that no further legal restrictions would be introduced before the new year. Will guidance alone be enough to stop Omicron?
Prof Chris Whitty urged the public to exercise caution on 15 December, and cut down on social contacts ahead of Christmas, and it appeared to strike a chord with the public, as retailers reported a far lower footfall than expected.
The growth rate of infections has slowed recently, but it is not clear if that is down to a reduction in social mixing or if people are choosing not to get tested.
