The complexity of protecting poultry from HPAIV: Findings from a case-control study in Sweden.
High pathogenicity avian influenza (HPAI) has caused severe disruptions to poultry production worldwide and in Sweden in the last decade. During 2020 and 2021, 18 outbreaks were confirmed in poultry due to viral introduction from wild birds. The aim of the study was to investigate farm-level risk factors for HPAI in Sw...