Pope John Paul has spent a second night under close medical care, but Vatican officials say his fragile health has stabilized.

Vatican chief spokesman Joaquin Navarro-Valls said Wednesday the pope was running a slight fever and will remain at Rome's Gemelli hospital for a few more days. Italian Prime Minister Silvio Berlusconi said he is convinced the pontiff will be released in two or three days.

The 84-year old pope was hospitalized late Tuesday for treatment of an acute inflammation of the respiratory tract brought on by the flu. He came down with the flu Sunday and had canceled all of his engagements over the past couple of days.

The pope suffers from Parkinson's disease, which gradually affects control of the muscles, including those of the throat and chest.