As Queen Camilla opens up about her pneumonia ordeal, the Mirror takes a look back at her painful health history and the determined measures she's taken when sticking to her royal duties

The Queen has told guests at the state visit of Qatar's Emir and his wife today that her chest infection was a form of the lung disease. Camilla is suffering from post-viral fatigue and is missing the outdoor elements of the Qatari visit after being urged by her doctors to take more time to recover.

The Queen has told guests at the state visit of Qatar's Emir and his wife that her chest infection was a form of pneumonia

Despite suffering from post-viral fatigue after having pneumonia, Queen Camilla joined King Charles, Prince William and guests including David and Victoria Beckham at Buckingham Palace last night