Amid ongoing health issues facing Pope Francis, here is the process by the Vatican when a pontiff passes away.

Pope Francis, battling double pneumonia in hospital for two weeks, had an "isolated breathing crisis" on Friday and received "non-invasive mechanical ventilation" to help him breathe, the Vatican said in a statement.

Pope Francis has reached the two-week mark in his recovery from pneumonia, with doctors indicating that he has passed the most critical phase of the infection. However, medical professionals remain cautious,