Pope health update: Vatican reports Pope Francis' health has "slightly improved."

The Vatican stated Monday that Pope Francis’ «critical clinical condition» had shown a «slight improvement,» while the 88-year-old pope is still in the hospital after being diagnosed with pneumonia. According to a statement from the Vatican press office, «the doctors are still cautious about the prognosis due to the complexity of the clinical picture.» There were «no episodes of asthmatic respiratory crisis» on Monday, according to the office, and certain lab results «have improved.» «Oxygen therapy continues, albeit with slightly reduced flows and oxygen percentage,» the doctor’s office stated. The Vatican press office announced earlier in the day that Francis was «resting» on Monday morning following his tenth night in the hospital. The office said that he returned to work Monday afternoon.

According to Vatican insiders who spoke to ABC News, the pope has been eating regularly, is awake, and is still receiving medical treatment. According to the sources, he is also in good spirits and not in any pain.

«Pope Francis thanks all the people of God who have gathered in these days to pray for his health,» according to the Vatican.

Following a bout of bronchitis, Francis has been admitted to Gemelli Hospital in Rome since February 14.

Vatican insiders told ABC News that the pope, who has presided over the Catholic Church since 2013, had yet another round of clinical testing on Sunday morning.

He was still in critical condition on Sunday, according to officials.

The Vatican said Tuesday that the pope had been diagnosed with pneumonia.