Inhibition of delayed hypersensitivity by pre-immunization without complete adjuvant.
D000017:ABO Blood-Group System; D000818:Animals; D000917:Antibody Formation; D001789:Blood Group Antigens; D005620:Freund's Adjuvant; D006168:Guinea Pigs; D006968:Hypersensitivity, Delayed; D007114:Immunization; D007122:Immunoelectrophoresis; D007983:Lewis Blood Group Antigens; D010047:Ovalbumin
D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D007983:Lewis Blood Group Antigens; D010047:Ovalbumin; D005620:Freund's Adjuvant