whereas about 100 mg of living antigen per kg of body-weight are sufficient to induce a degree of hyperimmunity , 1240 mg/kg of a freshly prepared crude antigen are necessary to enable the mice to survive a challenge infection while 3500 mg-7000 mg/kg of a vaccine prepared from freshly isolated plasmodia are necessary to produce a degree of immunity comparable with hyperimmunity .
C0003320
antigen
C0020964
immunity