Pope Francis suffered two episodes of "acute respiratory failure" on Monday, the Vatican said. The episodes were caused by a "significant accumulation of endobronchial mucus and consequent bronchospasm,

Pope Francis on Monday suffered two attacks of "acute respiratory insufficiency," the Vatican said, as the 88-year-old continues his health fight.

Pope Francis suffered two episodes of acute respiratory failure Monday, the Vatican said, a fresh setback in the worst health crisis of his papacy.