During routine surveillance at the National Influenza Center, Denmark, we detected a zoonotic swine influenza A virus in a patient who became severely ill. We describe the clinical picture and the genetic characterization of this variant virus, which is distinct from another variant found previously in Denmark.
Keywords: Denmark; H1pdm09N1av subtype; Orthomyxoviridae Infections; Swine influenza virus; influenza; influenza A virus; viral zoonoses; viruses; zoonoses.