title: Westward ho?--The spread of West Nile virus.
authors.affiliation: Centers for Disease Control and Prevention, Fort Collins, Colo, USA.
authors.forename: Lyle R
authors.initials: LR
authors.lastname: Petersen
authors.forename: Edward B
authors.initials: EB
authors.lastname: Hayes
mesh_terms: D000818:Animals; D009033:Culicidae; D006801:Humans; D007303:Insect Vectors; D014481:United States / Q000453:epidemiology; D014901:West Nile Fever / Q000453:epidemiology* / Q000635:transmission; D014902:West Nile virus