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abstractpubmed· Abstract 2018· item PMID:30124409
Estimating Frequency of Probable Autochthonous Cases of Dengue, Japan. Imported dengue into naive areas is a recognized but unquantified threat. Differentiating imported and autochthonous cases remains problematic. A threshold approach applied to Japan identified several aberrant incidences of dengue. Despite these alerts, no epidemics occurred other than 1 in Yoyogi Park in Tokyo, which was probably an unusual event.