title: Prevalence of hepatitis B surface antigen (HBsAg) and antibody (HBsAb) in civilian blood donors in Delhi area.
mesh_terms: D000293:Adolescent; D000328:Adult; D000914:Antibodies, Viral / Q000302:isolation & purification*; D005260:Female; D006509:Hepatitis B / Q000276:immunology*; D006510:Hepatitis B Antibodies / Q000302:isolation & purification*; D006514:Hepatitis B Surface Antigens / Q000302:isolation & purification*; D006801:Humans; D007194:India; D008297:Male; D008875:Middle Aged
chemical_list: D000914:Antibodies, Viral; D006510:Hepatitis B Antibodies; D006514:Hepatitis B Surface Antigens