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. 2021 Dec 14;20:467. doi: 10.1186/s12936-021-04007-3

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© The Author(s) 2021

Open AccessThis 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/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 4 — Distribution of msp1 and msp2 haplotypes in P. falciparum isolates from 2010 to 2016 in STP. The pie charts show the distribution of msp1 and msp2 haplotypes isolated from parasites across three different periods in STP. Period B and C are the low transmission periods with ascending and descending trend, respectively. Period D is the pre-elimination phase. The msp1 haplotypes include KH1-KH9 (yellow colors, K1 family), MH1-MH8 (blue colors, MAD20 family), and RH1-RH4 (green colors, RO33 family). In msp2, 11 haplotypes are found in the 3D7/IC family (IH1-IH11, orange colors), and 10 haplotypes are found in the FC27 family (FH1-FH10, gray colors)