Mmastodon HealthHealth first seen 6 h ago, last 5 h ago, peak #6

Japan declares nationwide flu outbreak as all prefectures exceed alert threshold

Original: The average number of influenza patients per monitored medical institution has exceeded 1.0 in all 47 prefectures in Jap

Japan's health ministry says the average number of influenza patients per monitored medical institution has surpassed 1.0 in all 47 prefectures, the threshold that signals a nationwide flu outbreak. It is unusual for every prefecture to cross the marker at the same time, prompting attention to the early and unusually widespread start of the season.

Why now: An early, nationwide flu epidemic spanning all 47 prefectures is an unusual and concerning public health development.

JapanJapan Ministry of Healthinfluenza

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Evidence

• The average number of influenza patients per monitored medical institution has exceeded 1.0 in all 47 prefectures in Japan, signaling a nationwide flu outbreak, according to a health ministry announcement. https://www. japantimes.co.jp/news/2026/10/… · thejapantimes · 2

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