Western equine encephalitis: geographical patterns and range expansion of an emerging arbovirus disease in the Americas.

The article offers information on Western equine encephalitis virus (WEEV), a mosquito-borne arbovirus that circulates enzootically among birds but can be transmitted indirectly from vertebrate animals to humans through arthropod vectors in a complex life cycle. Topics discussed include epidemiology of WEEV infection in the Americas, spatial and temporal distribution of WEEV, and other emerging vector-borne viruses reported in 2023 in the Americas.