genetic and antigenic analysis of the influenza virus responsible for the 1992 hong kong equine influenza epizootic. | an outbreak of influenza occurred among thoroughbred racehorses in hong kong in november-december 1992, with morbidity of 37%. all horses involved had been vaccinated against equine-1 and equine-2 influenza viruses but not against the virus responsible for the 1989 equine influenza outbreak in northern china (influenza a/equine/jilin/89, subtype h3n8). therefore the source and nature of the virus causing the hong kong outbreak was investigated. virus isolated from a horse infected during the out ... | 1994 | 7941336 |