Pope Francis is still critically ill as he battles double pneumonia, but his condition has shown a “slight improvement”, the Vatican said on Monday. The 88-year-old pontiff is spending his 11th night in Rome’s Gemelli Hospital, making it the longest hospital stay of his nearly 12-year papacy.“The clinical conditions of the Holy Father, in their critical nature, show a slight improvement,” the health update read. The pope, it said, was still receiving oxygen, “although with slightly reduced flow and oxygen percentage”.It added that the “mild kidney insufficiency,” which was first reported on Sunday, was “not a cause for concern”. A Vatican official, who did not wish to be named because he was not authorised to speak about the pope’s condition, earlier said that Francis was eating normally and was able to get up and move about his hospital room.Monday’s statement said the pope had resumed work in the afternoon and in the evening made a call to the Catholic parish in Gaza, which the pope has done frequently during the Israel-Hamas war.On Sunday, the Vatican described the pope’s condition as critical for a second day. On Saturday, it said the pope had needed a blood transfusion after experiencing a “prolonged asthma-like respiratory crisis”.Also Read: | Night passed well’: Vatican on Pope Francis’s healthMonday’s update said the pope had not had further respiratory crises and that some of his laboratory tests “have improved”.Double pneumonia is a serious infection that can inflame and scar both lungs, making it difficult to breathe. The Vatican has described the pope’s infection as “complex,” and said it was caused by two or more microorganisms. Francis, who has been pope since 2013, has suffered bouts of ill health over the past two years. He is particularly prone to lung infections because he developed pleurisy as a young adult and had part of one lung removed.Story continues below this adThe pope’s prolonged illness has provoked an unusual amount of public speculation among Catholic cardinals, the highest ranking officials in the 1.4 billion-member church after the pontiff.New York Cardinal Timothy Dolan, who is not known as close to Francis and did not cite information beyond the Vatican’s medical updates, said in a homily during Mass at his cathedral on Sunday that the pope was “probably close to death”.German Cardinal Gerhard Muller, a former Vatican official known to have disagreed with Francis on doctrinal issues, admonished prelates who were publicly speculating about the pope’s condition or planning for a conclave, the secret gathering of cardinals to elect a new pope.He told Italy’s Corriere della Sera that cardinals were not receiving any more information than the public about the pope’s condition.“We are not medical experts,” said Muller about cardinals.Story continues below this adAlso Read: | Pope Francis ailing: How will a new Pope be chosen?“The pope is still alive and this is a moment for prayer,” he said. “If there is anyone who is looking to the future while Francis is in the hospital, that’s good for nothing.”The Vatican was planning to host a prayer service for Francis in St. Peter’s Square on Monday evening. The service, the first of continuing nightly prayers in the square, will be led by Cardinal Pietro Parolin, the second most senior official in the Vatican.Outside Gemelli Hospital, groups were gathering on Monday to pray for Francis near a statue of the late Pope John Paul II, who was treated at the facility many times over his 1978-2005 papacy.Maria Vozlv, a Ukrainian who has lived in Rome for 18 years, said many in her home country were praying for Francis.Story continues below this adThe pontiff has often decried the three-year-old war in Ukraine and prayed for peace.“We Ukrainians are really praying for him,” Vozlv said. “He needs to get well and come home.”