Pope France, who has been in the hospital since February 14, experienced two episodes of acute respiratory insufficiency, 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.

ROME and LONDON -- 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," the Vatican's press office said in a brief statement.

Pope Francis, 88, was placed on a non-invasive mechanical ventilator after a bronchospasm caused him to inhale vomit. His condition is “guarded.”

The pope "rested well during the night" and woke shortly after 8 a.m. this morning, his 20th day in hospital, as his condition remains stable and his prognosis remains reserved, according to the Vatican.

Pope Francis "slept all night" following Monday's medical intervention amid two episodes of "acute respiratory failure," the Vatican said Tuesday. "The pope slept all night, now he continues his rest,