Johnson was taken to St. Thomas' Hospital in London on Sunday evening after struggling to shake off virus symptoms for 10 days. Watch their remarks live in the player above.
The 37-year-old future king of England wished the prime minister of the UK, Boris Johnson, a speedy recovery while he battles coronavirus in the ICU. He's receiving standard oxygen treatment and breathing without any assistance.
He said Johnson was not receiving mechanical ventilation or "noninvasive respiratory support". The Prime Minister has received some oxygen support and he's being kept under close supervision.
"There are well-developed protocols", said Cabinet Office Minister Michael Gove, who himself went into self-isolation on Tuesday after a family member displayed coronavirus symptoms. "We are rooting for him".
"There is an established order of precedence", Johnson's spokesman said.
"In testing times, we often observe that the best of the human spirit comes to the fore; the dedication to service of countless nurses, midwives and other health workers, in these most challenging of circumstances, is an example to us all".
Britain's unwritten constitution does not spell out what happens if a prime minister becomes unable to perform his or her job.
Queen Elizabeth II, 93, made a rare public address on Sunday, evoking the spirit of World War II and urging Britons to stay united in a broadcast watched by 23 million people.
In late March, the duke and duchess also got their kids involved and posted a video of Prince George, Princess Charlotte, and Prince Louis clapping for those helping to fight the virus.
Raab entered Downing Street on Tuesday to chair the government's COVID-19 emergency response meeting.
He continued to work throughout his illness, to the concern of some of his colleagues.
The U.K. has been hard hit by the coronavirus outbreak, which has so far claimed 5,373 lives.
The spokesman said that the mood in government is "determined", and ministers have a very clear plan set out by Mr Johnson for responding to the pandemic. A decision was taken that he needed to be moved to an intensive care unit at around 7pm. "He's been really something very special - strong, resolute, doesn't quit, doesn't give up".
"I simply can't talk about national security matters", Gove said when asked by the BBC about whether Raab would have authority to fire nuclear weapons if the country came under attack.
"We know from our own experience that when patients reach a threshold of about six litres per minute in need, we often preemptively intubate them because we can predict that they may deteriorate fairly rapidly thereafter if they're not put on a ventilator", said Sharkawy. "This was Boris Johnson and his people". "I wish him well".
Clarence House said that Prince Charles sent his and wife Camilla, Duchess of Cornwall's wishes for a speedy recovery on Tuesday morning.
Russian President Vladimir Putin said Mr Johnson's "energy, optimism and sense of humour" would help him get better. She also experienced coronavirus symptoms and is recovering separately from the PM. Seven prime ministers have died in office, but the most recent was in 1865.
Mr Johnson, who has been prime minister only since July past year, is not known to have any underlying health issues, although he has struggled with his weight.