Volume 28, Number 5—May 2022
Research
Determining Existing Human Population Immunity as Part of Assessing Influenza Pandemic Risk
Figure 1
![Seroprevalence of hemagglutination inhibition antibodies to different swine influenza viruses, by age group and location, in study to determine existing human population immunity as part of assessing influenza pandemic risk. A) A/swine/Hong Kong/NS4003/2016 (EA); B) A/swine/Guangdong/104/2013 (EA); C) A/swine/Hong Kong/NS301/2013 (TR); D) A/swine/Hong Kong/1436/2016 (pdm09); E) A/swine/Hong Kong/4348/2016 (BD-like H3). BD, Binh Duong; EA, Eurasian avian-like; pdm09, 2009 pandemic strain; TR, triple-reassortant.](/eid/images/21-1965-F1.jpg)
Figure 1. Seroprevalence of hemagglutination inhibition antibodies to different swine influenza viruses, by age group and location, in study to determine existing human population immunity as part of assessing influenza pandemic risk. A) A/swine/Hong Kong/NS4003/2016 (EA); B) A/swine/Guangdong/104/2013 (EA); C) A/swine/Hong Kong/NS301/2013 (TR); D) A/swine/Hong Kong/1436/2016 (pdm09); E) A/swine/Hong Kong/4348/2016 (BD-like H3). BD, Binh Duong; EA, Eurasian avian-like; pdm09, 2009 pandemic strain; TR, triple-reassortant.
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