Pope Francis, who began his fifth day in hospital for what doctors have described as a "complex" respiratory infection, will not take part in this weekend's Holy Year events, the Vatican says.
The 88-year-old pontiff has been suffering from a respiratory infection for more than a week and was admitted to Rome's Gemelli hospital on Friday.
A planned public papal audience set for Saturday had been cancelled "due to the health condition of the Holy Father", the Vatican said in a brief statement.
A papal mass scheduled for Sunday will still take place, but will be led instead by a senior Vatican official, it added.
The Vatican said on Monday that doctors had changed the Pope's drug therapy for the second time during his hospital stay to tackle a "complex clinical situation".
They described it is a "polymicrobial infection of the respiratory tract".
Doctors say polymicrobial diseases can be caused by a mix of viruses, bacteria and fungi.
Francis, who has been pontiff since 2013, has had influenza and other health problems several times over the past two years. As a young adult he developed pleurisy and had part of one lung removed, and in recent times has been prone to lung infections.
In an earlier update, the Vatican said Francis was in "stable" condition, with no fever.
From the hospital, the Pope has continued making calls to Gaza's sole Catholic parish, according to a local priest based in the enclave.
The Pope has said he has been in regular contact with the parish since the start of the war in Israel and Gaza in October 2023.
"He told us 'I am not well' and you could see he was tired," the local priest, Father Gabriel Romanelli, told Italian public broadcaster Rai about a video call he had with the pontiff on Saturday.
Romanelli, a fellow Argentine, quoted Francis as saying, "A few days (in hospital) and I'll be back", and quipped that he was "not an easy patient for doctors, because he is always talking, always very active".
Vatican spokesperson Matteo Bruni did not specify whether the Pope was suffering from a bacterial or viral infection.
Francis, who has been pontiff since 2013, has had influenza and other health problems several times in the past two years.
As a young adult he developed pleurisy and had part of one lung removed, and in recent times has been prone to lung infections.
