He was admitted to the hospital late Sunday with a fever and cough that persisted 10 days after he was diagnosed with the virus and was moved to the ICU Monday evening after his condition worsened. "He is receiving standard oxygen treatment and breathing without any other assistance".
In Mr Johnson's absence, Dominic Raab, the Foreign Secretary and First Secretary of State, will stand in for him "whenever necessary", including leading the daily meetings of the coronavirus "war cabinet".
"There's an incredibly strong team spirit behind the Prime Minister, and making sure that we get all of the plans the Prime Minister's instructed us to deliver, to get them implemented as soon as possible", Raab said during a press conference, according to the Telegraph. "He has not required mechanical ventilation or non-invasive respiratory support".
In a round of broadcast interviews, Gove said Johnson was fit, enjoyed tennis and has a "zest and appetite for life", so it was "naturally concerning" how ill he was with coronavirus. He later said he was now staying at home after a family member displayed mild coronavirus symptoms.
I must end by expressing my honest thanks to all the staff at University College London Hospitals NHS Foundation Trust. The British Prime Minister has since then been in isolation and was working from his office 10 Downing Street. During the press conference, British Prime Minister Boris Johnson told pubs, cafes, bars, restaurants and gyms to close, whilst Chancellor Rishi Sunak announced that the government will pay up to 80% of the wages of those unable to work due to the coronavirus (COVID-19) crisis.
Experts said it was not uncommon for coronavirus patients to move to intensive care, but said it showed Mr Johnson's condition was serious.
For many people it brought home the seriousness of the disease that has so far killed 5,373 people in Britain.
News of his admission to hospital, 11 days after he developed a cough and high temperature, caused national and global concern, with world leaders from the USA president, Donald Trump, to the French leader, Emmanuel Macron, sending their best wishes and hopes for Johnson's recovery. He's been a really good friend. Prince Charles, the heir to the British throne, wished Johnson a speedy recovery. He did not identify the companies, but said "we have contacted all of Boris' doctors, and we'll see what's going to take place, but they are ready to go".
Johnson delegating Raab to fill in for him clarifies things for now, but it does not mean Raab would automatically take over permanently should a new leader be needed.
The spokesman said that the Queen would continue to be kept regularly updated about his condition. With Johnson conscious, it is not clear how much of his job has been deputized to Raab. In the US, there are clear rules about who becomes leader of the country if the president becomes unable to continue in the role.