Prevalence of antibodies to hepatitis a virus (HAV) in blood donors of 13 western hemisphere countries and territories.
D000569:Americas; D000914:Antibodies, Viral / Q000032:analysis*; D006505:Hepatitis / Q000453:epidemiology; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006507:Hepatovirus / Q000276:immunology*; D006801:Humans
D000914:Antibodies, Viral; D006514:Hepatitis B Surface Antigens