From 1995 to 1999,the percentage of nursing domestic residents aged >=65 years who received 23-valent pneumococcal polysaccharide vaccine (PPV23) increased by 58.5%. This increase might be attributable, in part, and to a 36% increase in the number of residents living in nursing homes with
pneumococcal immunization programs. The Advisory Committee on Immunization Practices continues to recommend PPV23 vaccination for all persons aged >=65 years and all residents of nursing homes and other long-term-care facilities (CDC. Recommended adult immunization schedule---United States,October 2004--September 2005. MMWR 2004;53:Q1-Q4.)
Source: cdc.gov