Reassortant Influenza A(H1N1)pdm09 Virus in Elderly Woman, Denmark, January 2021

• DOI: 10.3201/eid2712.211361
• Publication Date: 2021-11-09T23:43:50Z
• Authors: Jakob N. Nissen; Sophie J. George; Charlotte K. Hjul...; Jesper S. Krog; Xiaohui C. Nielsen; Tina V. Madsen; Klara M. Andersen; Tyra G. Krause; Lasse S. Vestergaard; Lars E. Larsen; Ramona Trebbien
• Keywords: Swine Diseases; 0301 basic medicine; Swine; Denmark; R; influenza A(H1N1)pdm09; Infectious and parasitic diseases; RC109-216; Orthomyxoviridae; 3. Good health; respiratory infections; 03 medical and health sciences; Influenza A Virus, H1N1 Subtype; Orthomyxoviridae Infections; Influenza, Human; Research Letter; Medicine; Animals; Humans; influenza; swine flu; Reassortant Viruses; Aged

A case of human infection with influenza A(H1N1)pdm09 virus containing a nonstructural gene highly similar to Eurasian avian-like H1Nx swine influenza virus was detected in Denmark in January 2021. We describe the clinical case and report testing results of the genetic and antigenic characterizations of the virus.