The Queensland Children's hospital is overhauling its security systems after a man posed as a doctor and roamed the hospital for 6 months.
The man in question, Nicholas Delaney has been charged with fraud, unlawful entry and committing an indictable offence.
In response to this security breach, the hospital has ordered an overhaul of its entire CCTV network and swipe card access system.
The man is said to have an intellectual impairment.