Outbreak of influenza A in a nursing home--New York, December 1991-January 1992.

During December 1991 and January 1992, an outbreak of influenza A occurred among residents of a nursing home in New York. From mid-October through mid-November 1991, influenza vaccine was administered to 295 (88%) of the 337 residents of the nursing home. The residents shared common dining and recreational areas; the mean age of residents was 83 years (range: 51-103 years); 256 (76%) were female. The prevalence of underlying illness in vaccinated and unvaccinated patients was not determined.