Pope Francis' condition remains critical after developing pneumonia in both lungs earlier this month, but the Vatican said he is showing signs of improvement.

Pope Francis, who is in critical condition in hospital battling double pneumonia, rested well throughout the night, the Vatican said on Tuesday. The 88-year-old pope was admitted to Rome's Gemelli hospital on February 14 with a serious respiratory illness that has since triggered other health problems.

Pope Francis' resumes work but he is still in critical condition according to the Vatican. Fears have been growing about the pontiff’s condition after he was admitted to the hospital on Feb. 14, later experiencing breathing difficulties and being diagnosed with "double pneumonia.