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The Weekly Epidemiological Report (WER) is expanding to include a virology section. Starting this week, the Virology Laboratory at Dijon University Hospital, which also serves as the National Reference Center (NRC) for Enteric Viruses, will contribute to the Weekly Epidemiological Report by providing data on the circulation of respiratory viruses in Burgundy and enteric viruses in Burgundy and Franche-Comté.The Virology Laboratory (Dr. Jean-Baptiste Bour) and the NRC for Enteric Viruses (Prof. Pierre Pothier) conduct epidemiological surveillance and research on: the epidemiology of viral gastroenteritis, the immune response to enteric viral infections, and vaccination strategies, as well as the epidemiology and immune response to respiratory infections. They naturally collaborate with the InVS, IFREMER, ANSES, INSERM, ANRS, other university hospitals, Euro-CDC, RIVM (NL), and the Health Protection Agency (UK).They also participate in several national and European research networks: epidemiological surveillance and characterization of enteric viruses (NoroNet, EuroRotaNet networks), immune response to respiratory infections in the elderly, and the national surveillance network for rotavirus infections in pediatric settings. The laboratory also provides operational diagnostic surveillance for viruses that are potential agents of public health crises (avian influenza, coronaviruses, dengue, chikungunya, etc.). To track regional trends in the main circulating respiratory viral strains as well as enteric viruses, page 5 will present the virological data in two figures (Figures 7 and 8).The figure below presents the strains characterized last winter by the laboratory (major influenza strains, respiratory syncytial virus (RSV), metapneumovirus, and rhinovirus/enterovirus).It notably shows the period of RSV circulation between November and April and the circulation of influenza viruses (the A(H3N2) strain was predominant during the epidemic period, while the B strain continued to circulate after the epidemic).