| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Outline of Final Research Achievements |
The present study has been made to analyze the influenza surveillance data in 1999/2000 to 2017/2018 influenza seasons in Japan and to develop a statistical method for analyzing causal relationships among variables. The influenza vaccine efficacy and effectiveness cannot be examined from reported influenza-like illness (ILI) patient and vaccine dose data; however, it is statistically concluded that reported ILI patient data have an increasing trend, despite a rigorously increasing practice of influenza vaccination in Japan. The result may come from the methods of vaccine administration and/or environments in Japan. In order to control the infection, it is concluded that the vaccine efficacy and effectiveness must be studied over flu seasons and also, we have to clarify the cause of the contradictory phenomenon shown in the ILI patient surveillance and flu vaccine data in Japan. A basic method of path analysis has been made in view of entropy.
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