An outbreak of encephalomyelitis has been confirmed in Argentina, with cases detected in multiple departments. The virus, which is transmitted from birds to mosquitoes and then to humans and horses, can cause encephalitis and has symptoms such as fever, anorexia, depression, and in severe cases, can lead to death. In response to the outbreak, Senasa has implemented measures to prevent the further spread of the disease, including prohibiting egress movements of horses from affected provinces and requiring current vaccinations for eastern and western equine encephalomyelitis for entry to equine gathering events.