Pope Francis is in critical condition after suffering a long asthmatic respiratory crisis that required high flows of oxygen, the Vatican announced on Saturday. The 88-year-old Pope, who has been hospitalized for a week with a complex lung infection, also received blood transfusions after tests showed a condition associated with anemia.

“The Holy Father continues to be alert and spent the day in an armchair although in more pain than yesterday. At the moment the prognosis is reserved,” the Vatican said in a late update.

Earlier, doctors reported that Francis was battling pneumonia and a complex respiratory infection, which they described as touch-and-go. The Pope is expected to remain hospitalized for at least another week.

Despite the Pope’s absence, the Vatican carried on with its Holy Year celebrations on Saturday. In an earlier update, the Vatican reported that Francis slept well overnight.

The Pope’s health has been a concern in recent years, and his hospitalization has sparked widespread concern among Catholics and non-Catholics alike.