title: Surveillance of viral infections in donated blood, England and Wales, 1999.
mesh_terms: D001782:Blood Donors / Q000706:statistics & numerical data*; D017848:Blood-Borne Pathogens; D004739:England / Q000453:epidemiology; D006801:Humans; D011159:Population Surveillance; D014777:Virus Diseases / Q000453:epidemiology*; D014852:Wales / Q000453:epidemiology