title: Australia antigen in Singapore. II. Differential frequency in Chinese, Malays and Indians.
mesh_terms: D002353:Carrier State; D005006:Ethnicity; D006509:Hepatitis B / Q000453:epidemiology; D006511:Hepatitis B Antigens / Q000032:analysis; D006515:Hepatitis B virus; D006801:Humans; D007104:Immune Adherence Reaction; D005779:Immunodiffusion; D012846:Singapore
chemical_list: D006511:Hepatitis B Antigens