Why is Pope Francis' pneumonia particularly challenging to treat?

Pope Francis' pneumonia is especially complicated to treat because it's a polymicrobial pneumonia affecting both lungs, requiring more complex medical intervention. Adding to these complications are the pontiff's advanced age of 88 years and his medical history, which includes having part of a lung removed when he was younger. These factors create significant challenges for his medical team, as his respiratory system is already compromised from previous surgery, and his age makes him more vulnerable to serious complications from respiratory infections. Despite these serious health concerns, reports indicate the pope remains in good spirits while his public schedule has been cleared indefinitely.