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What Is the ‘Super Flu’ That Is Spreading in Europe and the United States?

Ritsuko Kawai

created: Jan. 2, 2026, 10 a.m. | updated: Jan. 20, 2026, 10:54 a.m.

The spread of influenza became more severe this fall, particularly in the United States and the United Kingdom. Against this backdrop, some media outlets have begun using the term “super flu.” However, this term is not an official medical term. This allows it to partially evade immunity acquired through previous infection or vaccines, making people more susceptible to infection. The influenza epidemic is hitting earlier this year in many parts of the world. During the three years of the coronavirus pandemic, the influenza epidemic was largely suppressed.

2 months ago: Science Latest