Pope Francis, the 88-year-old leader of the Catholic church, had another setback in his battle with double pneumonia after suffering two acute respiratory failures when mucus in his lungs made it harder to breathe.

Pope Francis has suffered two episodes of acute respiratory failure while battling pneumonia in a hospital in Rome. The 88-year-old leader of the Catholic church has been placed back on mechanical ventilation,

The Vatican said as of Tuesday morning, Francis no longer needed to wear the noninvasive mechanical ventilation mask that covers his nose and mouth to pump oxygen into his lungs and was just receiving supplemental oxygen through a nasal tube.