The 88-year-old pope, who has chronic lung disease and had part of one lung removed as a young man, woke up after sleeping through the night, the Vatican said.

The morning after suffering two acute episodes of respiratory crisis, Pope Francis no longer needed oxygen through a breathing mask, the Vatican said.

Pope Francis remained in stable condition and didn’t need any mechanical ventilation Sunday, the Vatican said. It was a sign that he had overcome the possible complications from a respiratory crisis Friday and that his breathing function overall was improving as he recovers from pneumonia.