Francis is being treated for pneumonia, a complex infection and kidney problems that have left him in critical condition. He did some light work on Monday.

Pope Francis remained in critical condition Monday but showed slight improvement in laboratory tests and resumed some work, the Vatican said, including calling a parish in Gaza City that he has kept in touch with since the war there began.

Pope Francis is in critical condition and is being treated for double pneumonia, but was permitted to return to work from his hospital bed, according to the Vatican. Concerns about the pontiff's renal and lung issues,