The 88-year-old pontiff is in good spirits and is grateful for the prayers for his recovery, the Vatican said.

Pope Francis has developed pneumonia in both lungs as he remained hospitalized Tuesday in Rome, according to the Vatican, which called the 88-year-old's condition "complex."

Pope Francis, 88, was hospitalized last Friday with bronchitis, the Vatican said, and now has a “polymicrobial infection of the respiratory tract.”