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, is again receiving "non-invasive, mechanical ventilation" to help with his breathing.

How are Catholics around the world responding to Pope Francis’s health update? Pope Francis, the 88-year-old leader of the Catholic Church, is fighting a serious health battle as he remains hospitalized in Rome.

Pope Francis is being treated with supplemental oxygen to assist him with breathing, the Vatican said Tuesday, a day after he suffered two episodes of acute respiratory failure. Francis is currently receiving oxygen again via a nasal tube,