title: Pattern of hepatitis B antigen--contact and carrier state in Northern India.
mesh_terms: D001782:Blood Donors; D002353:Carrier State / Q000453:epidemiology*; D006509:Hepatitis B / Q000453:epidemiology*; D006510:Hepatitis B Antibodies / Q000032:analysis; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D007194:India
chemical_list: D006510:Hepatitis B Antibodies; D006514:Hepatitis B Surface Antigens