Update: Detection of West Nile virus in blood donations--United States, 2003.
D000368:Aged; D000369:Aged, 80 and over; D001782:Blood Donors / Q000706:statistics & numerical data; D001803:Blood Transfusion / Q000592:standards; D006801:Humans; D008297:Male; D008875:Middle Aged; D065227:Transfusion Reaction; D014481:United States / Q000453:epidemiology; D014766:Viremia / Q000175:diagnosis* / Q000453:epidemiology; D014901:West Nile Fever / Q000453:epidemiology / Q000517:prevention & control / Q000635:transmission*; D014902:West Nile virus / Q000302:isolation & purification*