The Duchess of Cornwall has tested positive for COVID-19, Clarence House has said.
Camilla, 74, caught the virus for the first time just days after her husband the Prince of Wales caught it a second time.
A Clarence House spokesman said on Monday: “Her Royal Highness The Duchess of Cornwall has tested positive for COVID-19 and is self-isolating.
“We continue to follow government guidelines.”
Both Charles and Camilla have been fully vaccinated against COVID-19, including a booster shot.
Charles, Prince of Wales, tested positive last Thursday, on a day when the duchess carried out a number of engagements.
At the time, she described herself as “luckily” negative, saying she had been tested “so many times”.
The Queen was in contact with Charles, her eldest son, two days before he tested positive, but Buckingham Palace said on Thursday that she was not displaying any symptoms.
The palace refused to confirm whether the 95-year-old had tested positive for the virus, however, citing privacy.
Charles previously tested positive for the virus in March 2020, when he suffered mild symptoms.
His son Prince William, the Duke of Cambridge, tested positive shortly afterwards.