TY - JOUR AU - Fiore, Anthony E. AU - Levine, Orin S. AU - Elliott, John A. AU - Facklam, Richard R. AU - Butler, Jay C. T1 - Effectiveness of Pneumococcal Polysaccharide Vaccine for Preschool-Age Children with Chronic Disease T2 - Emerging Infectious Disease journal PY - 1999 VL - 5 IS - 6 SP - 828 SN - 1080-6059 AB - To estimate the effectiveness of pneumococcal polysaccharide vaccine, we serotyped isolates submitted to the Pneumococcal Sentinel Surveillance System from 1984 to 1996 from 48 vaccinated and 125 unvaccinated children 2 to 5 years of age. Effectiveness against invasive disease caused by serotypes included in the vaccine was 63%. Effectiveness against serotypes in the polysaccharide vaccine but not in a proposed seven-valent protein conjugate vaccine was 94%. KW - United States DO - 10.3201/eid0506.990616 UR - https://wwwnc.cdc.gov/eid/article/5/6/99-0616_article ER - End of Reference