F2 and tetanus: In detail, the antibody GMCs tended to be lower for post-primary anti-PRP (ratio of 0.66) and anti-tetanus (ratio of 0.78) in the IPARA group and for post-primary anti-tetanus (0.81) in the DPARA group (Table 3), as well as for post-booster anti-PT in the NPARA-IPARA and IPARA-NPARA groups compared to the control group (Table S5).