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. 2022 Sep 29;9:1003351. doi: 10.3389/fvets.2022.1003351

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Copyright © 2022 Lee, Ntakiyisumba, Seol and Won.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Visualization of the prevalence data for swine influenza A virus (swIAV) by the significant covariates; publication year, sample size, and growth stage of pigs. (A) Change in swIAV prevalence according to the publication year visualized by a weighted scatter plot. Solid red line denotes the regression describing association among the prevalence, the small sample size, and the publication year. Solid blue line indicates regression depicting the relationship among the prevalence, the large sample size, and the publication year. Dashed lines show 95% CIs of the regression model. (B) swIAV seroprevalence proportion by each growth stage using the bar plot. Circles or triangles indicate individual studies and the size of the figures corresponds to the weighted average of effect size of each study. The sample size is represented by red (small) and blue (large) colors. Error bar represents 95% CIs.