As of 1600 GMT on Thursday, deaths of confirmed hospital cases of the virus was 3,605 - 684 more than in the previous 24-hour period, according to the government.
However, Buckingham Palace has confirmed that Her Majesty is in good health.
The Queen is to speak to the nation about the coronavirus outbreak.
Queen Elizabeth gives televised addresses each year on Christmas Day, but Sunday's message will be the fourth time she's directly spoken to the public on TV outside of the holiday.More news: Why has the United Kingdom lagged behind in testing for the coronavirus?
Previously, she spoke out following the death of her mother in 2002, shortly before Princess Diana's funeral in 1997 and during the First Gulf War in 1991.
When the Queen initially remained at Balmoral to comfort her grandsons Princes William and Harry, the newspaper headlines screamed: "Show us you care" and "Where is our Queen? and "Where is her flag?".
The Queen, who has only made a handful of rare televised addresses like this during her 68-year reign, and whose duty as head of state is to maintain neutrality, is likely choosing this moment in time during an global crisis to speak when the nation is completely united, according to CTV News Royal Commentator Richard Berthelsen.
Her Majesty's message is said to have already been recorded in Windsor Castle.More news: CDC to recommend the voluntary use of non-surgical masks, Trump said
It came as the allied land offensive began against Iraqi forces occupying Kuwait.
There were concerns for the Queen after one of her footmen received a positive coronavirus diagnosis.
The monarch also made a televised address when she thanked the nation for the festivities commemorating her Diamond Jubilee, describing it as "a humbling experience".
The 93-year-old monarch acknowledged the anxiety and difficulties many people have faced not just due to infections, but also with regard to the future.More news: Biden Rips Trump's 'Unacceptably Slow' Virus Response