Disentangling transport movement patterns of trucks either transporting pigs or while empty within a swine production system before and during the COVID-19 epidemic - Picasso-Risso, Catalina (The Ohio State University. Department of Veterinary Preventive Medicine) ; Vilalta, Carles (Unitat mixta d'investigació IRTA-UAB en Sanitat Animal. Centre de Recerca en Sanitat Animal) ; Sanhueza, Juan Manuel (Departamento de Ciencias Veterinarias y Salud Publica, Facultad de Recursos Naturales, Universidad Católica de Temuco) ; Kikuti, Mariana (University of Minnesota. Department of Veterinary Population Medicine) ; Schwartz, Mark (University of Minnesota. Department of Veterinary Population Medicine) ; Corzo, Cesar A. (University of Minnesota. Department of Veterinary Population Medicine)