That, to me, is the most ghastly thing."
He also had a visit with his mother, 95-year-old Queen Elizabeth, at Windsor Castle.
Queen Elizabeth had met with her son on Tuesday, two days before Charles tested positive.
However, there were reports that she received her second shot in April.
At the time, Charles and Camilla released a statement on the importance of boosters.
This news surprised royal watchers and the world.
As of this writing, there has been no comment yet from William’s younger brother, Prince Harry.
