title: Immunization of Rh-negative volunteers by repeated injections of very small amounts of Rh-positive blood.
mesh_terms: D000917:Antibody Formation; D003298:Coombs Test; D005260:Female; D006801:Humans; D007114:Immunization; D007075:Immunoglobulin M / Q000032:analysis; D007518:Isoantibodies / Q000032:analysis; D008297:Male; D008875:Middle Aged; D012204:Rh-Hr Blood-Group System
chemical_list: D007075:Immunoglobulin M; D007518:Isoantibodies; D012204:Rh-Hr Blood-Group System