Related Experiment Video
Updated: Jun 1, 2026

An Optimized Hemagglutination Inhibition (HI) Assay to Quantify Influenza-specific Antibody Titers
Published on: December 1, 2017
Risk of hospitalization related to influenza A(H3N2) virus subclade K, Thailand, June-December 2025
Kriengkrai Prasert1, Prabda Praphasiri2, Darunee Ditsungnoen3
1Nakhon Phanom Hospital, Nakhon Phanom 48000, Thailand.
Abstract:
Antigenically drifted influenza A(H3N2) subclade K viruses have contributed substantially to influenza burden since 2025, but their clinical severity is less well described. Using sentinel surveillance data from Thailand, we found no significant difference in the adjusted odds of hospitalization among those infected with subclade K versus other influenza viruses (adjusted odds ratio 1.06, 95% confidence interval 0.67, 1.68). This approach to estimating hospitalization risk for an emerging influenza virus subclade using sentinel surveillance data could serve as a model for conducting future rapid assessments.
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