Unnoticed high human infection incidence for West Nile virus and Usutu virus in the Netherlands: evidence from a longitudinal nationwide cohort, 2020-2023
Background Ecological surveillance indicates (regional) establishment of West Nile virus (WNV) and Usutu virus (USUV) in the Netherlands. However, the incidence of human infections remains unknown. Methods We identified WNV and USUV infections in the Netherlands in 2020-2023, using a longitudinal, nationwide population...