Changing Varicella Epidemiology in Active Surveillance Sites—United States, 1995–2005

Significant reductions in varicella incidence were reported from 1995 to 2000 in the varicella active surveillance sites of Antelope Valley (AV), California, and West Philadelphia (WP), Pennsylvania. We examined incidence rates, median age, and vaccination status of case patients for 1995–2005. Cove...

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Bibliographic Details
Published in:The Journal of infectious diseases 2008-03, Vol.197 (Supplement-2), p.S71-S75
Main Authors: Guris, Dalya, Jumaan, Aisha O., Mascola, Laurene, Watson, Barbara M., Zhang, John X., Chaves, Sandra S., Gargiullo, Paul, Perella, Dana, Civen, Rachel, Seward, Jane F.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Age
Age groups
California - epidemiology
Chickenpox
Chickenpox - epidemiology
Chickenpox - prevention & control
Chickenpox vaccine
Chickenpox Vaccine - administration & dosage
Child
Child care
Child, Preschool
Elementary school students
Epidemiology
Humans
Immunization Programs
Incidence
Infant
Pennsylvania - epidemiology
Population Surveillance - methods
Preventive medicine
Surveillance
United States - epidemiology
Vaccination
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Summary:Significant reductions in varicella incidence were reported from 1995 to 2000 in the varicella active surveillance sites of Antelope Valley (AV), California, and West Philadelphia (WP), Pennsylvania. We examined incidence rates, median age, and vaccination status of case patients for 1995–2005. Coverage data were from the National Immunization Survey. By 2005, coverage among children 19–35 months of age reached 92% (AV) and 94% (WP); 57% and 64% of case patients in AV and WP, respectively, were vaccinated; and varicella incidence declined by 89.8% in AV and 90.4% in WP. Incidence declined in all age groups, especially among children
ISSN:0022-1899
1537-6613
DOI:10.1086/522156