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. 2020 Jul 16;10:11856. doi: 10.1038/s41598-020-68844-z

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© The Author(s) 2020

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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Characteristics of DENV infection and recruitment of patients. (a) Age distribution of subjects enrolled in the study and confirmed DENV-positive. (b) Chart depicts the proportions of primary and secondary DENV cases and the serotypes of DENV that were confirmed by PCR. (c) Histograms depict the numbers of patients recruited (frequency) for each day post-fever onset. The x-axis represents the number of days between fever onset and patient enrollment for DHF (n = 39) and DF (n = 45) patients. Black lines indicate the fitted curves for each histogram.