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. 2021 Apr 13;11:8021. doi: 10.1038/s41598-021-87535-x

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Dynamic characteristics of serum antibodies in pregnant women and infants. (a) Correlation between maternal infection time and serum IgM titer in pregnant women (M-IgM); (b) Correlation between maternal infection time and serum IgG titer in pregnant women (M-IgG); (c) correlation between the maternal serum IgG and IgM titer in pregnant women; (d) correlation between maternal serum IgG and infant IgG titer (I-IgG); (e) correlation between the maternal infection time before delivery and the IgG titer of infants; (f) predicting the sensitivity and specificity of maternal antibodies transferring into infants. Pearson test was used to analyze the correlation between the two groups, P < 0.05 was considered to be statistically significant.