Pope Francis’ upcoming commitments appeared increasingly in question Monday as he spent a fourth day in the hospital with a respiratory tract infection that has already sidelined him

The Vatican says Pope Francis slept well during a quiet first night in the hospital after being admitted with a respiratory tract infection. Francis, 88, ate breakfast Saturday morning and

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

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

Vatican spokesman Matteo Bruni said the results of tests conducted in recent days and Monday indicate the pope is suffering from a “polymicrobial respiratory tract infection” that has necessitated a further change in his drug therapy.

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

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

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

Pope Francis’ respiratory tract infection is presenting a “complex clinical picture” that will require further hospitalization, the Vatican said Monday as concerns grew about the increasingly

Pope Francis' respiratory infection is presenting a "complex clinical picture" that will require further hospitalization, the Vatican said Monday, as concerns grew about the increasingly frail health of the 88-year-old pontiff.

Doctors not involved in the care of Pope Francis said he likely has a mix of bacteria, viruses, fungi and parasites growing in his lungs.