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. 2022 Aug 8;12:13524. doi: 10.1038/s41598-022-17071-9

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© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2022

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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Anti-SARS-CoV-2 activity of IgG fractions eluted from day-28, -60, -90, and -150 sera of high and moderate responders against Delta variant. Time dependent alterations of antiviral activity of IgG fractions. Graph shows the EC₅₀ results of high and moderate responders against Delta variants, including IgG data obtained from sera of day-150 post 1st vaccine dose.