2007 Fiscal Year Final Research Report Summary
Influenza vaccination of preschool(in kindergarten or nursery) and school children: estimating vaccine efficacy and the ripple effect for the elderly in their families
| Project/Area Number |
16590498
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Public health/Health science
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| Research Institution | Niigata University |
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Principal Investigator |
SEKI Nao Niigata University, Institute of Medicine and Dentistry, Professor (30270937)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Hiroshi Niigata University, Institute of Medicine and Dentistry, Professor (20091704)
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| Project Period (FY) |
2004 – 2007
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| Keywords | influenza / vaccine / children / elderly in household / GIS / surveillance / open information system |
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| Research Abstract |
This study was conducted in four years targeting all the preschool (in kindergarten or day nursery) and elementary school children in Sado Island, a large solitary island in Niigata Prefecture. The influenza vaccine efficacy in children was shown in the study but there were seasonal differences in the protection rate. Although the children's influenza virus infection was statistically related to that of elderly members in the same family and 25-50% of index case in the family outbreak were children, we could not statically confirm that the vaccination of children protect elderly from infection.
Additionally, with the cooperation of medical centers in Sado Island, we mapped the outbreaks by Geographic information system (GIS) from the patient information data, and analyzed the epidemics. In Sado, the transportation of people and visiting hospitals is limited and isolated, which was an advantage for the epidemiological study. From the preliminary study focused on pediatric patients from 2 hospitals, the outbreak in Sado Island started from elementary school children. Also it was clear that spreading patterns were different by influenza types (type A and B). In the next two seasons we enlarged the study sentinels to 20 clinics and included reported patients in all age groups, and constructed a system of "influenza open information system of local area". Though the dominant type was type A in both seasons, the spreading patterns of influenza were different. Continuing the study and accumulating data is needed to make simulation of influenza spreading patterns.
The access number to weekly updates of influenza open information system of local area' was high in outbreak season and increased every year This surveillance system is accurate and useful to see the timely outbreak status in a local area "Sado" and provides a prompt feed-back system representing a high benefit for the local people.
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Research Products
(11 results)
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[Journal Article] Effectiveness of influenza vaccination amone young children and school childrenv V2004
Author(s)
Nao, Seki, Atsushi, Iwaya, Minoru, Okazaki, Hisano, Nakamura, Shigetaka, Inuo, Tsukasa, Torigoe, Takatsugu, Sakai, Hiroshi, Suzukil
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Journal Title
The Journal of the Japan Pediatric Society 109
Pages: 1217-1224
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Effectiveness of influenza vaccination for children in Sado island, 2004-2005 and 2006-2007 influenza seasons
Author(s)
Asami, Sasaki, Nao, Seki, Atsushi, Iwaya, Minoru, Okazaki, Hiroshi, Suzukil
Organizer
The 39th Annual Meeting of The Japanese Society for Pediatric Infectious Diseases
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Study of the effectiveness of influenza vaccination among Kindergartners and school children in Sado island0
Author(s)
Atsushi, Iwaya, Minoru, Okazaki, Nao, Seki, Takatsugu, Sakai, Hiroshi, Suzukil
Organizer
The 108th Annual Meeting of The Japan Pediatric Society
Place of Presentation
Tokyo, Japan
Year and Date
00000423
Description
「研究成果報告書概要(欧文)」より
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