Specific for respiratory syncytial virus (nucleoprotein (N)). Reacts only with mature virions with completely assembled nucleocapsids. Do not reacts with the N-protein epitope of immature and destroyed virions, with influenza A and B viruses, adenovirus and parainfluenza type 1 and 2 viruses. Can be used for detection of incomplete virus assembly; works in WB and in lateral flow.