Foreign Secretary Dominic Raab has taken over many of Johnson’s duties temporarily while he is being treated at St Thomas’ Hospital. Britain has no official post of deputy prime minister.
The 55-year-old Johnson is the first major world leader to be confirmed to have Covid-19. He was admitted to the hospital late on Sunday with a fever and cough that persisted 10 days after he was diagnosed with the virus. He was moved to the ICU Monday evening after his condition worsened.
“The prime minister has been stable overnight and remains in good spirits. He is receiving standard oxygen treatment and is breathing without any other assistance,” said Johnson’s spokesman, James Slack.
He said Johnson was not receiving mechanical ventilation or “noninvasive respiratory support”. He would not give details of what form of oxygen treatment the prime minister was getting.
Cabinet Office Minister Michael Gove said Johnson was “receiving the very, very best care from the team at St Thomas’ and our hopes and prayers are with him and with his family”.
“It was a shock yesterday to hear the news of his going into intensive care,” said Gove, who is in isolation at home after a family member showed mild coronavirus symptoms. “All of us just want him to pull through — he is the leader of our country. He is a big-hearted, generous-spirited guy, who believes in public service. We are rooting for him.”
Johnson’s fiancee, Carrie Symonds, who is pregnant, is herself recovering from coronavirus symptoms.
Raab said “the government’s business will continue” despite the prime minister’s hospitalisation.
He said Johnson had asked him “to deputise for him where needed in driving forward the government’s plans to defeat coronavirus”.
Read more: Boris Johnson hospitalised for tests after persistent coronavirus symptoms
The deterioration of Johnson’s health took many in Britain by surprise. On Monday afternoon, he tweeted that he was in good spirits and thanked the National Health Service for taking care of him and others with the disease.
The government faced calls on Tuesday to be more transparent about Johnson’s condition amid concerns it had underplayed how serious it was.
It’s not common for details about the health of British prime ministers to be made public, except at times of crisis. Even then, information has sometimes been scanty. When Winston Churchill suffered a debilitating stroke in 1953, the government kept it secret until Churchill recovered. Buckingham Palace said Queen Elizabeth II was being kept informed about Johnson’s condition.
Johnson had been quarantined in his Downing Street residence since being diagnosed with Covid-19 on March 26.
He continued to work throughout his illness, to the concern of some of his colleagues. With the UK still approaching the peak of the coronavirus outbreak and the government facing criticism it did not act soon enough to put the country into lockdown, Johnson and his ministers are under intense pressure.
Johnson chaired daily meetings on the outbreak until Sunday. He released several video messages during his 10 days in isolation urging Britons to stay home and observe social distancing measures to help slow the spread of the virus.
Concerns had been growing about Johnson’s welfare ever since he posted a message on Friday in which he appeared red-eyed and flushed, saying he was feeling better though was still feverish.
Johnson’s former communications director, Will Walden, said the prime minister tended to try to soldier on through illness rather than taking a break.
“He’s pretty stoic and can be a bit bloody-minded about that kind of thing,” Walden told the BBC.
