Britain's Prince Charles gave a COVID-19 positive result four days ago, and on Monday, Clarence House confirmed that his wife, Duchess Camilla, has also tested positive for the virus.

While Charles, 73, has been isolated since receiving the news, Camilla, 74, continued attending public engagements, ABC News reports. Now, Clarence House has confirmed that Camila will self-isolate. The Duchess of Cornwall took tests daily since her husband’s results came back, but only tested positive 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,” the statement read.

Charles previously tested positive in March 2020. Both royals have received three doses of the COVID-19 vaccine.

Charles also met with his mother, Queen Elizabeth II, last week. However, Buckingham Palace has said the Queen, who recently celebrated her Platinum Jubilee, has not shown signs of any symptoms of the virus. It has not been clarified whether she tested positive.

Just ahead of Feb. 6, which was her anniversary of a historic 70 years on the throne, the Queen, 95, announced that Camilla will be Queen Consort when Prince Charles ascends to the throne, becoming King.