As Pope Francis has battled double pneumonia in hospital for nearly three weeks, talk of the 88-year-old pontiff's death or resignation has become almost commonplace. Some newspapers have published articles informing their readers about what to expect during the papal funeral.

The frail 88-year-old Catholic leader suffered further setbacks in what has become a more than two-week battle to overcome a complex respiratory infection.

This was the pope's "third serious downturn" since he was admitted to Gemelli Polyclinic hospital with a complex respiratory infection on Feb. 14, the BBC said. The Vatican said laboratory tests suggested the mucus was a response to Francis' original pneumonia, not a new infection.