The 32-year-old former political advisor – who is expecting her first child with Mr. Johnson at the start of the summer – has become self-isolated in their house in south London.
She tweeted over the weekend about how she herself was bedridden with symptoms of coronavirus, but was now on the mend.
A friend told the Daily Telegraph that Mrs. Symonds was “upset” and “in tears” when the Prime Minister was taken to hospital on Sunday evening.
She described how she was “deeply upset and worried about her well-being.”
It was thought that she could not even be with her mother, Josephine Mcaffee, at her home in Camberwell because she was part of a vulnerable group due to her age.
However, it would appear that Ms. Symonds was able to speak to her partner after No10 confirmed that Mr. Johnson was able to contact those he needed.
It is also understood that the Prime Minister has appointed Ms. Symonds as his next of kin – which means that it will be his responsibility to make decisions on his behalf if he needs ventilator treatment.
The couple have barely seen each other for weeks, with Johnson giving daily lectures and holding endless meetings to discuss the growing pandemic before being positive.
Their hour-by-day meetings were reduced to zero as he began to isolate himself in his apartment above No. 11.
Ms. Symonds, who was previously responsible for communications for the Conservative Party headquarters, previously shared a photo of herself isolating herself with the dog Dilyn.
It was initially understood that she was staying with her mother in East Sheen, south-west London.
But that no longer seems to be the case.
The Prime Minister’s situation, however, “improved” yesterday, the ministers said as he prepared for a fourth night at the hospital – and his third in intensive care.
He was sitting in bed and talking to his doctors in a sign that he was starting to recover from Covid-19.
However, he could still be out of work for weeks after brushing with the killer bug that knocked him down for almost a fortnight.
Chancellor Rishi Sunak said that Johnson was receiving “excellent care” from his team at St Thomas Hospital in south London as concerns over the health of the PM increased.
Downing Street said he remained “clinically stable”, according to reports that his “persistent” high temperature had started to drop.
Johnson was treated with oxygen and authorities said he was “in a good mood” and that he was responding to the treatment.
But senior doctors said his visit to the hospital would weaken his strength as his body spent all of its energy fighting the disease.
Johnson’s official spokesperson confirmed that the PM would follow the doctors’ orders regarding his recovery.
It is understood that he ignored his doctor’s advice before being hospitalized for regular rest – instead, he continued to work long hours and chair meetings via video link.
Yesterday, at No. 10, a rainbow poster – adopted as a symbol of hope during the pandemic – was placed in the window, bearing the words: “We are together on this issue.”
Yesterday at the daily press conference, Mr. Sunak said, “The latest information from the hospital is that the Prime Minister is still in intensive care where his condition is improving. I can also tell you that he sat in bed and engaged positively with the clinical team. “
Downing Street said last night, “The Prime Minister continues to make steady progress. He remains in intensive care. Health Secretary Matt Hancock said, “The PM is seated and his condition is improving. He will fight. “
Foreign Minister Dominic Raab – who is now replacing Johnson – will chair the daily coronavirus “war cabinet” meeting for the fourth day in a row this morning.
But the potential length of Mr. Johnson’s rehabilitation raises important questions about how the government will deal with the peak of coronaviruses in his absence.
Raab appeared surprised at his first public appearance at the helm earlier this week.
Although he enjoys the support of his cabinet colleagues at the moment, some do not see him as a natural leader.
No10 confirmed that the Prime Minister did not work at the hospital and that Mr. Raab was fully responsible in his absence, with the support of Cabinet.
Johnson’s spokesperson said, “PM is not working, he is in intensive care. He has the ability to contact those he needs. He follows the advice of his doctors at all times. ”
But his return to full-time employment could take weeks, by which time health and science leaders hope the worst of the crisis will be over.
Professor Paul Hunter, infectious disease expert at the University of East Anglia, said, “I would expect most people who were so sick to need at least a month, if not two, to be back enough and be able to function. ”
Professor Mike Grocott, an intensive care medicine consultant at the University Hospital Southampton NHS Foundation Trust, said: “On average, a person who spends some time in intensive care on oxygen therapy alone would have a decrease in physical function during a period… likely to span several weeks.
“A period of inactivity will have an effect on physical function, usually characterized by loss of muscle mass and strength.
“It depends on the severity of the duration and extent of the illness, the quality and the time invested in rehabilitation.”
Senior Downing Street officials are working on the general rule that the Prime Minister will need at least a week of recovery for each day spent in intensive care.
Early evidence suggests that Mr. Johnson may have to stay in hospital for a month before he can even return to his Downing Street apartment.
Medical experts say he could spend at least a week on this in intensive care. Professor Duncan Young, a professor of intensive care medicine at the University of Oxford, said the most common duration in intensive care for a patient with coronavirus was four days, according to a study by the National Center for intensive care research and audit.
But he added, “A quarter remains eight days or more. “