title: Update: West Nile Virus activity--eastern United States, 2000.
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D017678:Sex Distribution; D015996:Survival Rate; D014481:United States / Q000453:epidemiology; D014901:West Nile Fever / Q000175:diagnosis / Q000453:epidemiology*; D014902:West Nile virus / Q000302:isolation & purification*