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AMB Express

Table 2 Comparing prevalence of HI titers to B/V and B/Y lineages in 2016–2017 and 2017–2018

From: Increasing serum antibodies against type B influenza virus in 2017–2018 winter in Beijing, China

Sera cohort/antigen

2016–2017(N = 121) No. (%)

2017–2018(N = 283) No. (%)

p value

B/Yamagataa

28 (23.14%)

187 (66.08%)

 < 0.01

B/Victoriab

28 (23.14%)

169 (59.72%)

 < 0.01

P value

1.00

0.054

–

  1. The percentages were estimated as a fraction of total cases belonging to each category. P values were estimated using χ2 tests or Fisher’s exact tests (age groups), and p values of 0.05 or less are shown in bold
  2. aB/Beijing/BTCH_71/2018 was used as the representative of B/Yamagata lineage virus
  3. bB/Jiangxi_Yushui/11102/2014 was used as the representative of B/Victoria lineage virus
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