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Volume 10, Number 10—October 2004

Research

Geographic and Temporal Trends in Influenzalike Illness, Japan, 1992–1999

Takatsugu Sakai*Comments to Author , Hiroshi Suzuki*, Asami Sasaki*, Reiko Saito*, Naohito Tanabe*, and Kiyosu Taniguchi†
Author affiliations: *Niigata University School of Medicine, Niigata, Japan; †National Institute of Infectious Disease, Tokyo, Japan

Main Article

Figure 2

Timing of peak influenzalike illness epidemic activity by week in Japan. The isobars on the contour maps represent interpolated time of peak activity distributed spatially at 1-week intervals. The first week was defined when the peak week was observed first in any one of the prefectures in each season, and then the following weeks were numbered.

Figure 2. Timing of peak influenzalike illness epidemic activity by week in Japan. The isobars on the contour maps represent interpolated time of peak activity distributed spatially at 1-week intervals. The first week was defined when the peak week was observed first in any one of the prefectures in each season, and then the following weeks were numbered.

Main Article

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