The office of British Prime Minister Boris Johnson says he "continues to make very good progress" in a London hospital after contracting COVID-19.

The 55-year-old Johnson was diagnosed with COVID-19 more than two weeks ago, becoming the first world leader confirmed to have the illness. His office has said he has taken "short walks" between periods of rest and had spoken to his doctors to thank them "for the incredible care he has received."

His coronavirus symptoms at first were mild, including a cough and a fever. He was admitted to St. Thomas' Hospital on Sunday after his condition worsened. He was transferred to the intensive care unit the following day where he received oxygen but was not put onto a ventilator.

He spent three nights there before moving back to a regular ward Thursday night.

British Heath Secretary Matt Hancock says it is too soon to determine whether the peak of coronavirus infections in the country has passed.

That is despite data suggesting the rate of increase in the number of people being hospitalized with the COVID-19 disease is leveling out.

Hancock tells BBC radio the "good news" is the number of hospital admissions shows signs of flattening out. However, he says the government requires more evidence before it can start making changes to its lockdown measures.

Britain has been in lockdown for nearly three weeks and the government is expected to extend the restrictions in coming days.

The government said Friday a total of 8,958 people had died in hospital after testing positive for the new coronavirus, up 980 from the previous day. That daily increase was bigger than anything witnessed in Italy and Spain, the two European countries with the greatest number of coronavirus-linked fatalities.

Hancock also says that 19 front-line workers in the National Health Service have died after contracting the virus.