title: West Nile virus infection may be greater than previously thought.
mesh_terms: D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D006801:Humans; D009518:New York / Q000453:epidemiology; D014901:West Nile Fever / Q000453:epidemiology*; D014902:West Nile virus / Q000472:pathogenicity*