Buckingham Palace has confirmed The Queen has tested positive for Covid-19.
A spokesman for the palace said she is experiencing mild cold-like symptoms.
Her Majesty is expected to carry out light duties at Windsor in the coming week, the Mirror reports.
A source has said there have been a number of cases in the Windsor Castle team.
The Queen had been closely watched after Prince Charles and Camilla both tested positive.
The head of state has fallen ill after it was confirmed she had been in direct contact with her eldest son and heir, the Prince of Wales, the week he had the disease.
The shock announcement was made just a few weeks after the nation’s longest-reigning monarch reached her historic Platinum Jubilee of 70 years on the throne on February 6.
Buckingham Palace said in a statement: “Buckingham Palace confirm that The Queen has today tested positive for Covid.
“Her Majesty is experiencing mild cold-like symptoms but expects to continue light duties at Windsor over the coming week.
“She will continue to receive medical attention and will follow all the appropriate guidelines.
The Queen is understood to be triple vaccinated but she had been on doctors’ order to rest since mid October, after canceling a run of engagements and spending a night in hospital undergoing preliminary tests.
She is believed to have spent time with Charles on Tuesday February 8, when he hosted an investiture at her Windsor Castle home, and a few days later he tested positive for Covid but made a quick recovery to full health.
The Duchess of Cornwall has also tested positive for Covid, with Clarence House confirming on Monday February 14 that the duchess was self isolating.
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