Influenza at the human-animal interface summary and assessment, 21 December 2023

Overview

From 2 November to 21 December 2023, two human cases of infection with avian influenza A(H5N1) viruses, one human case of infection with an avian influenza A(H5N6) virus, three human cases of infection with avian influenza A(H9N2) viruses, one human case of infection with an A(H1N1) variant virus and one human case of infection with an A(H1N2) variant virus were reported officially.