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Dengue virus serotype 1 circulation in Lao provinces based on the analysis of the samples collected by the Institut Pasteur du Laos arbovirus surveillance network between 2012 and 2020. The provinces indicated in yellow correspond to those where at least one sample was found positive for dengue virus serotype 1. The dots, squares and triangles indicate provinces where at least one sample was found positive for dengue virus serotype 2, 3 or 4, respectively.
