Asked about cutting the isolation period from seven days to five days, he said: "We're looking at that." But he added that the government would follow the science.
"We've got to make sure that we see off Omicron. We're making great progress," Johnson said in a broadcast clip.
"(But) the 18,000 people with COVID currently in hospital... that's massively up, and the numbers are increasing," he said, adding that perhaps 30% of those people had been infected in hospital.
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