Hanoi, Feb. 5 -- The Ministry of Health's Department of Preventive Medicine reported on February 5 that Vietnam's event-based surveillance system has recorded information about the seasonal flu outbreak in Japan.

According to data published by the National Institute of Infectious Diseases of Japan on January 31, about 9.5 million cases of seasonal flu were recorded in Japan from September 2, 2024 to January 26, 2025. During the final week of 2024 alone (December 23-29), over 317,000 cases were reported.

The outbreak is primarily concentrated in densely populated areas with high tourist traffic, including Tokyo, Hokkaido, Osaka, and Fukuoka. The current surge is predominantly driven by influenza A, although the risk of a B strain outbrea...