Pope Francis' condition has slightly improved, the Vatican said in a medical update on Monday, adding that his "slight" kidney problem was not a cause for concern.

Francis has been in the hospital now for more than a week with double pneumonia. The 88-year-old has long dealt with breathing problems. He had part of one lung removed decades ago.

“Pope Francis is touched by the numerous messages of affection and closeness that he continues to receive in these hours,” the Vatican statement said. The pope expressed particular gratitude for the well wishes he received from his fellow patients in Rome’s Gemelli Hospital and asked for continued prayers.