The Vatican carried on with its Holy Year celebrations without the pope Saturday, as Pope Francis battled pneumonia and a complex respiratory infection that doctors say remains touch-and-go and will keep him hospitalized for at least another week.

LONDON — Vatican officials said late Tuesday that Pope Francis had developed pneumonia in both lungs, further complicating the pontiff’s recovery. The 88-year-old pope was hospitalized Friday after a weeklong bout of bronchitis worsened. On Monday, doctors said he had developed a mix of infections in his respiratory tract.

Pope Francis’ condition poses no immediate threat to his life though he remains at risk after a week in the hospital for treatment of pneumonia, doctors said.