Pope Francis was found to have pneumonia in both his lungs Tuesday and his condition remains "complex," the Vatican said in a health update on the 88-year-old pontiff who was hospitalized last week. The big picture: The pope was admitted to Rome's Agostino Gemelli Hospital on Friday with bronchitis symptoms and his treatment was changed after doctors found he had a polymicrobial infection of the respiratory tract.

Pope Francis remains in critical condition as he battles double pneumonia, requiring high-flow oxygen and blood transfusions. The Vatican confirmed that the 88-year-old pontiff suffered a prolonged respiratory crisis but is alert and stable.