Loading metrics Open Access Peer-reviewed Research Article Simone Eschle , Katrin Hartmann, Anna Rieger, Sebastian Fischer , André Klima , Michèle Bergmann Simone Eschle, Katrin Hartmann, Anna Rieger, Sebastian Fischer, André Klima, Michèle Bergmann Published: August 27, 2020 https://doi.org/10.1371/journal.pone.0238371 Figures Abstract Background Vaccination is the most important preventive measure for protection against infectious diseases in humans and companion animals.