Figure 2

Fig. 2:distribution of tetanus antitoxin levels obtained by in vivo and in vitro tests per lot. Spearman's correlation coefficient between in vivo and in vitro results (Tables I and II) demonstrated r = 0.940 (p = 0.000) for the diphteria-tetanus vaccine and r = 0.951 (p = 0.000) for the diphiteria-tetanus-pertussis vaccine. ToBI: toxin binding inhibition