West Nile virus was found in dead birds in Warsaw. Human infection risk is low, but precautions are advised.
Recent tests on dead hooded crows in Warsaw revealed the presence of the West Nile virus (WNV), according to a joint statement by Poland’s Chief Veterinary Officer and Chief Sanitary Inspector. Despite the discovery, the risk of symptomatic infections in humans remains low.
Mass Bird Mortality Investigated
Warsaw has seen a mass die-off of corvids, including hooded crows, jackdaws, and magpies in recent weeks. Tests ruled out avian flu and Newcastle disease. However, in five out of seven samples taken from birds in several districts, WNV was detected. The results are being confirmed by the European Reference Laboratory in Paris.
Human Risk and Precautions
West Nile fever is primarily transmitted to humans by mosquitoes, with birds as the main reservoir. Most human infections are asymptomatic, though severe cases can affect the central nervous system. Public health officials recommend reducing exposure to mosquitoes and avoiding contact with dead birds.