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Influenza vaccination coverage: findings from immunization information systems
Laura A Zimmerman1, Diana L Bartlett, Kyle S Enger
1Immunization Services Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, NE, MSE-62, Atlanta, Georgia, 30333, USA. laz5@cdc.gov
BMC Pediatrics
|July 31, 2007
Summary
In the first season of a new influenza vaccine recommendation, about one-third of young children received at least one dose. Further efforts are needed to ensure children achieve full vaccination status for better public health outcomes.
Area of Science:
- Pediatrics
- Public Health
- Immunology
Background:
- The Advisory Committee on Immunization Practices (ACIP) formalized a recommendation for influenza vaccination in children aged 6-23 months starting in the 2004-05 season.
- This policy change aimed to increase influenza vaccine uptake in a vulnerable pediatric population.
Purpose of the Study:
- To evaluate influenza vaccination coverage among children aged 6-23 months during the 2004-05 season.
- To assess the effectiveness of Immunization Information Systems (IIS) in monitoring vaccination coverage.
Main Methods:
- Utilized data from well-functioning sentinel Immunization Information Systems (IIS) in Arizona (AIIS) and Michigan (MIIS).
- Calculated coverage for 1 or more doses and 2 or more doses (fully vaccinated) between September 2004 and March 2005.
- Analyzed dose administration patterns, provider types, age, and timeliness of data entry into IIS.
Main Results:
- Influenza vaccination coverage with at least one dose was 30% in AIIS and 27% in MIIS.
- Full vaccination (2 or more doses) was achieved by 13% in AIIS and 11% in MIIS.
- Coverage was higher in younger children, and over 75% of vaccine doses were recorded in IIS within 30 days.
Conclusions:
- While initial uptake of at least one influenza vaccine dose was substantial, a significant proportion of children did not complete the recommended vaccination schedule.
- Immunization Information Systems (IIS) provide a valuable tool for the timely assessment of vaccination coverage.
- Continued emphasis is necessary to improve the rate of fully vaccinated children against influenza.
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