A field outbreak caused by bovine respiratory syncytial virus.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology*; D009664:Norway; D012136:Respiratory Syncytial Viruses / Q000302:isolation & purification; D012141:Respiratory Tract Infections / Q000453:epidemiology / Q000662:veterinary*; D014777:Virus Diseases / Q000453:epidemiology / Q000662:veterinary*