Pope Francis experienced “two episodes of acute respiratory failure,” the Vatican said Monday, marking the latest in a series of medical crises the 88-year-old pontiff has endured since he was first hospitalized last month.

Pope Francis suffered two episodes of "acute respiratory insufficiency" on Monday, the Vatican said, a setback for the 88-year-old pontiff as he battles double pneumonia. Francis, who has been in Rome's Gemelli Hospital since February 14,

The pope has been undergoing treatment for double pneumonia and a complex infection in a Rome hospital, and his condition has been alternating between improvements and setbacks. On Friday, Francis suffered a bronchial spasm that caused him to inhale his vomit after a coughing fit.