Pope Francis was described by doctors as being in a stable condition today following additional respiratory difficulties yesterday.

He continues to use periodic ventilation and his prognosis remains unclear.

In a March 4 statement, the Vatican said the Pope’s condition throughout the day “remained stable".

“No episodes of respiratory failure presented, nor of bronchospasm,” it said, referring to previous spasms the Pope experienced on Feb. 28 and on March 3, in which the bronchi, the tubes connecting the lungs to the windpipe, seized and tightened, making it difficult to breathe.