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Global geographic distribution of research on virus removal from water (TS = (virus removal AND water)). The dots indicate the location of these 1060 literature research institutions, which are mapped by ArcGis according to the longitude and latitude of each research institution. The attribution is Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community.
