title: Decreased antigenic reactivity caused by chloroquine.
mesh_terms: D000941:Antigens / Q000276:immunology*; D001788:Blood Grouping and Crossmatching; D002738:Chloroquine / Q000276:immunology* / Q000494:pharmacology*; D000939:Epitopes; D006801:Humans; D012204:Rh-Hr Blood-Group System
chemical_list: D000941:Antigens; D000939:Epitopes; D012204:Rh-Hr Blood-Group System; D002738:Chloroquine