Pope Francis suffered two new acute breathing crises on Monday and has been put back on ventilation, the Vatican said – showing the 88-year-old’s struggle with pneumonia is far from over.The pontiff also underwent two lung scans and is suffering from congestion in his chest.

Francis had inhaled “copious” amounts of mucus in another setback in what has become a more than two-week battle to overcome a complex respiratory infection and pneumonia.