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Updated: Jun 5, 2026

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An Optimized Hemagglutination Inhibition (HI) Assay to Quantify Influenza-specific Antibody Titers
Published on: December 1, 2017
Serologic status for pandemic (H1N1) 2009 virus, Taiwan
Daniel Tsung-Ning Huang1, Pei-Lan Shao, Kuo-Chin Huang
1Mackay Memorial Hospital, Taipei, Taiwan.
Emerging Infectious Diseases
|January 4, 2011
Abstract:
We studied preexisting immunity to pandemic (H1N1) 2009 virus in persons in Taiwan. A total of 18 (36%) of 50 elderly adults in Taiwan born before 1935 had protective antibodies against currently circulating pandemic (H1N1) 2009 virus. Seasonal influenza vaccines induced antibodies that did not protect against pandemic (H1N1) 2009 virus.

