This update provides a comprehensive overview of the 2026 influenza season, including the emergence of the H3N2 “Super K” strain, updates to influenza vaccine composition, and current recommendations for influenza diagnosis and testing. It explores vaccine effectiveness, high-risk populations, and the role of PCR and rapid testing in clinical practice.
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Overview of the 2025 and 2026 influenza seasons
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Emergence and impact of the H3N2 “Super K” strain
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Antigenic drift and annual vaccine updates
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Changes to the 2026 influenza vaccine composition
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Trivalent vs tetravalent influenza vaccines
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Influenza vaccination recommendations by age and risk group
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New live attenuated influenza vaccine (LAIV) recommendations
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Diagnostic testing options: PCR, rapid PCR, and RAT testing
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Interpretation of influenza test results in clinical practice
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Managing high-risk populations and prevention strategies
