A Sydney nurse who spent three weeks in a coma after contracting a mystery illness has died, with hospital authorities still working to determine what struck him down. Russell Marsh, 39, fell ill with acute respiratory and kidney failure two days after complaining of an incident at his workplace, Fairfield Hospital, on February 12. The father-of-one, who was a registered nurse in Fairfield Hospital’s emergency ward was then placed on life support as his condition worsened.