Mr Johnson has since been discharged from hospital entirely and recuperating at the prime minister's country estate, Chequers, before returning to work.
Given the death toll, has been rising by around 900 per day since last week, few expect the restrictions to be lifted this week.
Foreign Secretary Dominic Raab will continue to deputize for Johnson.
Boris Johnson expressed his gratitude to several nurses in a video he posted when he left St Thomas' Hospital in London on Easter Sunday but the two he picked out for special mention - Jenny McGee, 35, from New Zealand and Luis Pitarma, 29, from Portugal - have now had unsought worldwide acclaim thrust on them.
On his way to Chequers, the Prime Minister's 1,000-acre country retreat in Buckinghamshire, Boris stopped briefly at 10 Downing Street, to record a very emotional five-minute video, in which he began by admitting that "the NHS has saved my life, no question".
Prime Minister Jacinda Ardern said she had sent Jenny a note on Facebook but was yet to hear back. A Number 10 spokesman confirmed Mr Johnson "would not be returning to work immediately" after being told to rest by his doctors.
He said his son was picked to help care for Mr Johnson partly because of his medical training, which includes expertise in oxygenation - a key element in Covid-19 treatment.
The conservationist went on: "There were times last week that were very dark indeed".
While Johnson has been out of action, his ministers have come under pressure to explain why the number of people dying of COVID-19 is rising so fast.
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Deaths from coronavirus have continued to mount in Britain, as of Sunday, a total of 9,875 deaths in United Kingdom hospitals have been recorded, with more than 78,000 confirmed cases. On earlier weekends, the numbers have dipped, which may replicate delays in registering deaths.
Requested to touch upon Farrar's prediction through the every day authorities information convention, Hancock didn't dispute it.
"The future of this virus is unknowable as yet because it depends on the behaviour of millions of people", he said.
"I want you to know that this Easter Sunday I do believe that your efforts are worth it, and are daily proving their worth", he said.
"She saved my life without doubt".
JOHANNESBURG - Some lawmakers in Botswana have been moved to supervised quarantine after failing to observe an instruction to self-isolate as the country tries to curb the spread of the coronavirus, the government said on Friday.
Mr Johnson was discharged from St Thomas' Hospital in London on Sunday, one week after being admitted to be treated for coronavirus.
The medical director of Public Well being England, Yvonne Doyle, mentioned there have been indicators that the variety of hospital admissions in London might be stabilising, however the place was nonetheless getting worse in components of northern England.