Vatican authorities said Monday that Pope Francis has a complex infection in his respiratory system and will require more targeted drug treatment. Officials said the 88-year-old pope is suffering from a “polymicrobial respiratory tract infection,

Pope Francis has been in the hospital since Friday with a respiratory tract infection. Officials with the Vatican said Monday that the 88-year-old’s infection requires further hospitalization and a change in drug therapy. Francis has had several health ailments over the years.

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.