Pope Francis, battling double pneumonia, remains in a critical condition for a second day running and has shown an "initial, slight insufficiency" in his kidney function, the Vatican said on Sunday. The prognosis for the 88-year-old pope,

Pope Francis remains in critical condition and on oxygen therapy after a "respiratory crisis" the night before. NBC News' Claudio Lavanga reports on the latest.

ROME — Pope Francis was conscious but still receiving high flows of supplemental oxygen Sunday following a respiratory crisis and blood transfusions, as he remains in critical condition with a complex lung infection, the Vatican said.