Dec. 15 (UPI) -- Mexico has confirmed its first case of influenza A(H3N2) subclade K, a variant commonly referred to as the "super flu," health authorities said, as the Northern Hemisphere faces an unusually early and intense flu season.
The infection was detected by the National Institute of Respiratory Diseases and confirmed by the Health Ministry, which said the patient recovered without complications and did not require hospitalization.
Influenza A(H3N2) is a respiratory infection caused by a subtype of the influenza A virus known for mutating rapidly, a characteristic that can contribute to outbreaks and complicates long-term immunity.
Symptoms are similar to those of other seasonal flu strains and include fever, headache, muscle pain, cough, nasal congestion, sore throat and general malaise.
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