In a startling development, Japan has recorded a staggering 317,812 weekly influenza cases for the week of December 23-29, 2024, marking a historic high since the current tracking method was initiated in April 1999. These shocking statistics come from the Ministry of Health, Labor, and Welfare, which compiled data from approximately 5,000 designated medical facilities across the nation.

The average number of cases per medical institution is now 64.39, a significant leap from the previous record of 57.09 set in January 2019. The surge is particularly alarming in the Kyushu region, which has become the epicenter of this flu outbreak. In the prefecture of Ōita, the rate has escalated to 104.84 cases per institution, while Kagoshima, Saga, Kumamoto, and Miyazaki are also facing daunting figures, reflecting the widespread nature of this outbreak. Alarmingly, nearly every prefecture, with exceptions like Akita, Yamagata, Toyama, and Okinawa, has surpassed the critical warning threshold of 30 cases.

Interestingly, the previous two flu seasons, 2020-21 and 2021-22, experienced record-low flu cases, largely attributed to preventive measures against COVID-19, such as mask-wearing and enhanced hygiene practices. While these strategies effectively curtailed influenza transmission, they also resulted in waning herd immunity. The recent downgrade of COVID-19 restrictions, where mask mandates have been lifted and international travel has resumed, has inevitably heightened the risk of significant influenza outbreaks across the nation.

Since the onset of the 2024-25 flu season in November, influenza cases have seen a steady increase over the span of ten consecutive weeks, culminating in this record-breaking week. Health authorities are urging vulnerable populations — particularly seniors, individuals with pre-existing medical conditions, and pregnant women — to obtain vaccinations as a precautionary measure. Additionally, citizens are advised to stock up on essential medications, such as pain relievers and antipyretics, and to familiarize themselves with the nearest medical facilities equipped to handle outpatient fever cases.

As the situation unfolds, public health experts stress the importance of vigilance in the face of this unprecedented outbreak. Will you take action to protect yourself and your loved ones? Be prepared, stay informed, and consider getting vaccinated today!