Officials said he would now convalesce at Chequers, the country estate of British prime ministers, on the advice of his medical team.
Nearly half of all pandemic fatalities have occurred over the past week.
More than 5,000 people have died from COVID-19 in Britain, fewer than in Spain, Italy and France.
The 104-year-old woman has become the world's oldest COVID-19 patient to have recovered after contracting the virus.
While the curve was bending in Europe, there was little sign of let-up in the United States, where the death toll approached 10,000.
The dead have included a 16-year-old in France, a 12-year-old in Belgium and Ismail Mohamed Abdullah, 13, in Britain.
Mercedes has asked its Formula 1 team, which was idle due to postponed or cancelled Grand Prix races, to get to work.
After weeks of a national lockdown in Italy, signs were emerging that drastic action could be slowing the spread of the disease.
At his daily briefing, Trump said a large quantity of aid was destined for Italy, which has the world's highest pandemic death toll.
The US has recorded 1,178 deaths, while the global death toll stood at 23,293.
Russia has not officially reported deaths from COVID-19.
In the hospital where eight patients have died of COVID-19, a nurse in her 20s was found unresponsive before passing away.
Trump, who is keen to get his reelection campaign back on track, said that social distancing has caused too much pain to the US economy.
The country has now seen its daily fatalities come down from a world record 793 on Saturday to 651 on Sunday and 601 on Monday.
The death toll from the virus surged to more than 14,400, according to an AFP tally on Sunday
President Donald Trump said meanwhile that the United States is fast-tracking antimalarial drugs for use as a treatment.
More than 2,100 people have died in Italy, which is supposed to host the opening game of Euro 2020 in Rome.
Undertakers refused to remove his sister's corpse from his family home for two days.
Ronaldo will not be flying back to Turin as he remains quarantined in his family home in Portugal.
Air France and low-cost carriers Ryanair, Easyjet and Wizz Air said they would scrap flights from Italian airports until early April.
Since the COVID-19 disease first emerged in China late last year, Italy has become Europe's hardest-hit country.
COVID-19 has kept fans from attending a closed-door Serie A match between Juventus and Inter Milan.