The Vatican says Pope Francis’ respiratory tract infection is presenting a “complex clinical picture” that will require further hospitalization.

In light of Pope Francis’ latest diagnosis, Dr. Leana Wen explains why older adults are especially at risk for serious disease due to respiratory infections.

Pope Francis rested during a peaceful night following a respiratory crisis and blood transfusions, the Vatican said Sunday. Vatican spokesman Matteo Bruni's one-line statement didn't mention if Francis was up or eating breakfast.