VATICAN CITY - Pope Francis will on Thursday mark the 12th anniversary of his election as leader of the world's 1.4 billion Catholics, but he will do so from Rome's Gemelli hospital where he has been treated for double pneumonia for almost a month.

Pope Francis is showing a "good response" to his treatment in hospital for double pneumonia and his overall condition is gradually improving, the Vatican said on Saturday. Francis, 88, has been in Rome's Gemelli hospital for more than three weeks with a severe respiratory infection that has required continuously evolving treatment.