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. 2017 May 2;7:1349. doi: 10.1038/s41598-017-00992-1

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© The Author(s) 2017

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Schematic graph showing the change of immune response of mice to different infections. SJ, immune response of mice infected by S. japonicum only; CI, immune response of mice infected by S. japonicum firstly then by S. typhimurium ATCC14028 five weeks later. Th1, type 1-T helper cell polarized immune response; Th2, type-2 T helper cell polarized immune response. 1 W, 3 W, 5 W, different time points after infection.