Bulletin of the World Health Organization

Sentinel versus population-based surveillance of pneumococcal conjugate vaccine effectiveness

Lee M Hampton, Elizabeth R Zell, Stephanie Schrag & Adam L Cohen

Volume 90, Number 8, August 2012, 568-577

Table 1. Active Bacterial Core surveillance system areas, United States of America, 1998–1999 and 2006

Surveillance area Average population in 1998–1999
 % change in population aged < 5 years from 1998–1999 to 2006 No. of hospitals reporting
Total no. No. of children < 5 years ≥ 1 IPD cases in 1998 or 1999 ≥ 5 IPD cases in 1998 and 1999 combined
California 746 276 34 370 19 6 0
Connecticut 3 278 050 214 726 −6 17 8
Georgia 3 801 578 288 607 34 18 6
Maryland 2 447 423 163 176 2 18 9
Minnesota 2 535 790 180 369 9 18 8
New York 1 104 857 78 018 −19 5 2
Oregon 1 373 146 93 559 13 4 2
Tennessee 1 318 865 87 547 14 12 5
All 16 605 985 1 140 372 11 98 40

IPD, invasive pneumococcal disease.