South Korea's Ministry of Environment and the Ministry of Agriculture, Food and Rural Affairs have announced the detection of the highly pathogenic H5N1 avian influenza virus in a wild mandarin duck in Yongin-si, Gyeonggi-do, marking the first detection this winter. This is the first time this strain has been detected in South Korea this season, and comes after similar detections in Japan and the prevalent worldwide presence of the N5N1 strain. In response, authorities have established a 'wild bird surveillance area', strengthened surveillance and control measures for domesticated poultry, and advised the public to report dead wild birds.