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. 2024 Jun 28;11:1409694. doi: 10.3389/fvets.2024.1409694

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Copyright © 2024 Ottardi, Lechner, Wang, Schmitt, Schneeberger, Schmid, Stephan and Meylan.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Geographical distribution of the 163 Swiss dairy farms included in the study [9 seropositive (red dots) and 154 seronegative (blue dots) herds]. Based on study data mapped in the Swiss Federal Geoportal https://map.geo.admin.ch/.