Waiting for fresh news on Pope Francis' health condition, people from all over the world on Wednesday (February 26) shared their concern for the pontiff's health as he struggles through double pneumonia in hospital.

The Vatican in the morning said Francis was in critical condition but had a quiet night in hospital and was resting It was the 88-year-old pope's 13th day in Rome's Gemelli hospital, the longest hospital stay of his nearly 12-year-old papacy.

On Tuesday (February 25), the Vatican said the pontiff had remained in critical condition for the fourth day running but was stable and had not had any further respiratory crises.

The pope's prognosis, it said on Tuesday, remains "guarded." But his hemodynamic parameters, a measure of the functioning of his body's circulatory system, were also "stable."

Double pneumonia is a serious infection of both lungs that can inflame and scar them, making it difficult to breathe. The Vatican has said the pope's infection is "complex," and caused by two or more microorganisms.

Francis, who has been pope since 2013, has suffered several bouts of ill health over the past two years. He is prone to lung infections because he developed pleurisy as a young adult and had part of one lung removed.

A further update on the pope's condition is expected on Wednesday evening.