Camilla, Duchess of Cornwall, gave an update on her father-in-law, Prince Philip , as the royal enters his third week of hospitalization for treatment of an infection.

Camilla said while visiting the Community Vaccination Centre on Wednesday that the 99-year-old Duke of Edinburgh is slightly improving, according to reporter Chris Ship of ITV News .

Buckingham Palace revealed for the first time last week that Philip, the husband of Queen Elizabeth , was battling an infection.

The palace later issued another statement saying Philip was being transferred to a second hospital and also was being evaluated for a preexisting heart condition. Neither statement elaborated on the ailments.