ROME (AP) — Pope Francis continued to improve from double pneumonia Thursday, the Vatican said, working from his hospital room and going to his private chapel to pray, though doctors said he needs more days of “clinical stability” before they revise their guarded prognosis.

A chest CT scan taken Tuesday evening showed the “normal evolution” of an infection as it is being treated, the Vatican said in its late update.

Pope Francis, who is being treated in hospital for double pneumonia, slept well overnight and is resting, the Vatican said in a brief statement on Thursday. The 88-year-old pontiff was spending his 14th day in Rome's Gemelli hospital after coming down with a severe respiratory infection that triggered various complications.