Congo fever case in Glasgow A man is being treated in complete isolation in a Glasgow hospital after being confirmed as having a potentially deadly tropical virus. Tests showed that the 38-year-old, who returned to Scotland on a flight from Dubai on Tuesday, has Crimean-Congo haemorrhagic fever (CCHF). He is in a critical condition at Gartnavel General Hospital's Brownlee Centre, which specialises in infectious diseases. CCHF is a tick-borne viral disease which is fatal in up to 30 per cent of human cases.