Why is West Nile Virus more of a concern in North America continent than in Europe?

West Nile Virus (WNV) is more of a concern in North America than in Europe due to several factors, including the presence of certain mosquito species that are efficient vectors for the virus, such as Culex pipiens. Additionally, environmental factors, urbanization, and warmer temperatures in North America promote mosquito breeding and WNV transmission. Public health responses and surveillance systems may also differ, contributing to varied incidence rates. Furthermore, WNV has established a more significant presence and epidemiological pattern in North America over the years.