Most clinicians would be aware of this disease, which is SaO 2=99% on air and respiratory rate (RR) of 14/min. rare in children but even rarer in adult. The evolving On examination nothing abnormal was found and she epidemiology in the last 2 decades (HIB vaccination was discharged with diagnosis of laryngitis and advice. programme), means that clinicians need to increase their vigilance in diagnosing this condition in adults.