title: Lack of serological relationship of ECHO virus types 1 and 12.
mesh_terms: D000818:Animals; D000937:Antigen-Antibody Reactions; D029822:Enterovirus B, Human / Q000276:immunology*; D000882:Haplorhini; D007106:Immune Sera; D009500:Neutralization Tests
chemical_list: D007106:Immune Sera