Volume 10, Number 10—October 2004
Research
Geographic and Temporal Trends in Influenzalike Illness, Japan, 1992–1999
Takatsugu Sakai*
, Hiroshi Suzuki*, Asami Sasaki*, Reiko Saito*, Naohito Tanabe*, and Kiyosu Taniguchi†
, Hiroshi Suzuki*, Asami Sasaki*, Reiko Saito*, Naohito Tanabe*, and Kiyosu Taniguchi†
Figure 3
Figure 3. Correlation analysis among three parameters. Greatest number of cases refers to the greatest number of reported influenzalike illness (ILI) cases per sentinel per week (RC/S/W) in each prefecture in each season. The increasing-to-peak period refers to the period from the week when the number of RC/S/W reached >50% of the peak to the peak week. The means of the above two parameters were calculated by season and used for analysis. The nationwide peak-duration refers to the time between the first and last peak week observed among 46 prefectures.
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