TABLE 2

Pertussis Case Spatial-Temporal Clusters in 2010 in California

Pertussis ClusterCluster CentroidStart DateEnd DateObserved CasesExpected CasesRelative RiskPDescription
Latitude °NLongitude °W
136.201121.153May 2010Oct 201037831835.532.91<.001Central California
233.231117.097July 2010Nov 2010980390.522.71<.001San Diego County