Pope Francis is responding “positively” to medical treatment for pneumonia, according to the Vatican, a week after the 88-year-old pontiff was hospitalized in Rome.

Vatican officials have said Pope Francis has developed pneumonia in both lungs, further complicating his recovery. The 88-year-old pontiff was hospitalized Friday after a weeklong bout of bronchitis worsened.

Pope Francis is in Rome's Gemelli hospital for double pneumonia, which hasn't fully resolved but poses no immediate life threat. At 88, with prior lung issues, he's frail. While his condition is slightly improving,