Overview
- For Nov. 10–16, the Health Ministry tallied 145,526 influenza patients from about 3,000 sentinel sites, averaging 37.73 per site.
- The national average exceeded the warning threshold of 30 patients per site, reaching this level roughly five weeks earlier than last season.
- Reported cases rose 1.73 times from the previous week, indicating a steep week-on-week increase.
- Regional variation is marked, with Miyagi Prefecture reporting the highest rate at 80.02 patients per sentinel site.
- Nagasaki issued its first seasonal advisory on Nov. 20 after 1,220 cases were reported in the latest week, equating to 23.92 per site, alongside eight grade-level school closures.