Figure 3
From: Novel reassortant swine H3N2 influenza A viruses in Germany
Incursion of Rietberg/2014-like swH3N2 into the German pig population. Dark squares indicate the places where virus-positive swabs were collected; collection dates (dd.mm.yyyy) are given; the sampling date of the first German isolate is printed in red. The inset presents the pig population density in Germany (numbers of pigs per administrative district). The data were retrieved from the 2017-yearbooks of the 16 State Statistical Offices in Germany and visualized with Regiograph Analyse software, version 2019 (distributed by GfK Geomarketing GmbH, Germany, download at https://regiograph.gfk.com).
