G Rothrock, MPH, A Reingold, MD, California Emerging Infections Program,
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C O'Malley, PhD, NJ Smith, MD, SH Waterman, MD, State Epidemiologist, California
Dept of Health Svcs. Meningitis and Special Pathogens Br, and Respiratory
Diseases Br, Div of Bacterial and Mycotic Diseases, National Center for Infectious
Diseases; Child Vaccine-Preventable Diseases Br, Epidemiology and Surveillance
Div, National Immunization Program, CDC.