The Vatican said on Friday that Pope Francis did not hold any audiences because he has a fever.

Further information regarding the condition of the 86-year-old Roman Catholic Pope was not provided by Vatican spokesman Matteo Bruni.

“Because of a fever, Pope Francis did not receive (anyone) in audiences this morning,” Bruni said in response to a reporter’s question on why none were listed on his daily schedule earlier in the day.

Francis spent five days in a Rome hospital at the end of March for bronchitis but recovered quickly following an infusion of antibiotics and returned to his duties, including a three-day trip to Hungary at the end of April.

He appeared to be fatigued at a meeting with students near the Vatican on Thursday afternoon.

Francis, who became pope 10 years ago, is missing part of one lung. It was removed when he was a young man in his native Argentina.

None of the pope’s scheduled events have been cancelled and he is due to preside at a Mass marking Pentacost on Sunday in St. Peter’s Square.

It was not clear if he would hold private audiences on Saturday.