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Experts weigh in on Pope Francis’ diagnosis A polymicrobial respiratory tract infection occurs when multiple microorganisms—bacteria, viruses, fungi, or parasites—infect the respiratory system.

Pope Francis has a complex infection in his respiratory system and will require more targeted drug treatment, according to Vatican authorities Monday. On Tuesday, he underwent a chest CT scan ...

Lower respiratory tract infections affect the airways and lungs. They include bronchitis, which is an inflammation of the airway passages leading to the lungs.

Earlier, the Vatican had said the 88-year-old had a “polymicrobial infection of the respiratory tract” and pneumonia in both lungs, with tests indicating a “complex clinical picture.” ...

Vatican officials announced on Monday that Pope Francis is battling a complex respiratory tract infection and will require more specific medication. (FILES) Pope Francis celebrates the mass for ...