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Health Officials Alert: 'Super Flu' H3N2 Causes Severe Symptoms

12/27/2025

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Summary

Story summary

Health officials warn that the H3N2 subclade K flu, nicknamed the "super flu," can cause severe symptoms such as fatigue and high fever.
Dr. Claire Agathou outlines four illness stages, with recovery typically 2–3 weeks and possible menstrual changes for women.
People should avoid overexertion during recovery.
Seek medical attention if symptoms worsen or persist beyond 7–10 days, especially for pregnant women and those with chronic conditions.

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Story summary

Health officials warn that the H3N2 subclade K flu, nicknamed the "super flu," can cause severe symptoms such as fatigue and high fever.
Dr. Claire Agathou outlines four illness stages, with recovery typically 2–3 weeks and possible menstrual changes for women.
People should avoid overexertion during recovery.
Seek medical attention if symptoms worsen or persist beyond 7–10 days, especially for pregnant women and those with chronic conditions.