Winston-Salem, North Carolina - Britain's Queen Elizabeth II has spoken about her bout of Covid-19, saying it left her "very tired and exhausted," as she sympathized with a former virus patient who lost his brother and father to the illness.

The 95-year-old monarch tested positive for Covid-19 in February and, despite having what Buckingham Palace said were "mild cold-like symptoms," was determined to carry out what duties she could.

She later overcame her bout of the virus and described the experience during a virtual visit to the Royal London Hospital on Wednesday, to mark the official opening of the medical institution’s Queen Elizabeth Unit.

During her video call with workers and medical staff, the queen listened to their stories of coping with the huge influx of Covid-19 patients, and was told by one senior nurse "we held their hands, we wiped their tears and we provided comfort."

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Around 800 people from across north-east London were treated at the 155-bed Queen Elizabeth Unit, built in five weeks to meet the demand instead of the normal time period of five months.

Speaking to former Covid-19 patient Asef Hussain, and his wife Shamina, the Queen said about the virus: "I’m glad that you’re getting better... It does leave one very tired and exhausted, doesn’t it? This horrible pandemic. It’s not a nice result."

Asef Hussain was the third member of his family to be admitted to hospital with Covid-19 after they became ill towards the end of December 2020. His brother died first and then his father, who passed away while Asef Hussain was on a ventilator.

The queen was told his wife called the ambulance after he had struggled to catch his breath, and Asef Hussain added: "I remember waking up one morning and just finding it really, really difficult to breathe."

"I remember waking my wife saying that I feel like there’s no oxygen in the room. I remember me sticking my head out the window, just trying to breathe, trying to get that extra oxygen."

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He was eventually put on a ventilator for seven weeks at the Royal London Hospital, and is still recovering, having recently dispensed with his wheelchair but now using a portable oxygen machine.

Shamina Hussain told the queen at one point there were 500 friends and family from across the world on a Zoom call praying for her husband, and the monarch lightened the mood and made the couple smile when she asked: "So you have a large family, or a large influence on people?"

The issue of families and friends being unable to visit loved ones being treated in hospital was discussed a number of times during the queen’s video call with hospital staff, and at one point she said: "Of course not being able to see your relative was very hard."