Britain's Prince William tested positive for coronavirus in April, according to media reports in the UK.
The Sun newspaper said the Duke of Cambridge continued with his telephone and video engagements, and told one observer he had not wanted to worry anyone.
When contacted yesterday, Kensington Palace declined to comment, but did not deny the report.
According to The Sun, the prince said he did not tell anyone about his positive test result because "there were important things going on and I didn't want to worry anyone".
The newspaper said he was treated by palace doctors and followed government guidelines by isolating at the family home Anmer Hall, in Norfolk, carrying out 14 telephone and video call engagements during April.
His father, the Prince of Wales, contracted coronavirus in March and he quarantined with mild symptoms separately from Camilla the Duchess of Cornwall, who tested negative, for 14 days.
The couple reunited just days before their 15th wedding anniversary in April.
In his first public engagement after recovering from mild symptoms, Prince Charles revealed he lost his sense of taste and smell when he had coronavirus.
He spoke of his personal experience with Covid-19 when he met frontline NHS staff and key workers in person with the duchess in mid-June.