RHINOSINUSITIS (COMMON COLD) Infection and inflammation of nose and sinus CAUSES Approximately 20–30% cases of acute rhinosinusitis are viral. Common viruses are: rhinovirus (most common in adults) ,Corona virus,Parainfluenza viruses, Adenovirus, picorna virus ,Coxsackie ,ECHO viruses ,Respiratory syncytial virus (RSV) ,Influenza virus Cold and Hot weather and when the weather changes Swimming and diving: Infected