Combined Phylogeographic Analyses and Epidemiologic Contact Tracing to Characterize Atypically Pathogenic Avian Influenza (H3N1) Epidemic, Belgium, 2019, Van Borm, Steven, Boseret Geraldine, Dellicour Simon, Steensels Mieke, Roupie Virginie, Vandenbussche Frank, Mathijs Elisabeth, Vilain Aline, Driesen Michèle, Dispas Marc, et al. , Emerging Infectious Diseases, Jan-02-2023, Volume 29, Issue 2, (2023)