A Phase III Randomized, Double-Blind, Active-Comparator Controlled Clinical Trial to Study the Safety, Tolerability, and Immunogenicity of V419 in Healthy Infants When Given at 2, 3, 4, and 12 Months (V419-007-03)

Percentage of Participants Vaccinated With PR5I Compared With INFANRIX™ Hexa With Acceptable Ab Response to Haemophilus Influenzae Type b, Diphtheria, Tetanus, and Poliovirus Types 1, 2 & 3, at 5 Months

Time Frame: One month after post-dose 3 of PRI5 (5 months old)

Antibody titres were measured by RIA for PRP, MIT for diphtheria \& poliovirus, and ELISA for tetanus. Percentage of participants with an Ab titre ≥0.15 μg/mL for Hib) (PRP); ≥0.01 IU/mL; for diphtheria \& tetanus; ≥8 (1/dil) for inactivated poliovirus types 1, 2 \& 3 (IPV1, 2 \& 3) are reported. The estimated response rates are based on the method by Miettinen and Nurminen stratified by country.

Percentage of Participants Vaccinated With PR5I With Acceptable Ab Response or Seroresponse Rates to All Antigens Contained in the PR5I Vaccine One Month After the Toddler Dose at 13 Months

Time Frame: One month after Toddler dose of PRI5 (13 months old)

Antibody titres in the PR5I group were measured by RIA for PRP, MIT for diphtheria \& poliovirus, enhanced Chemiluminescence assay (ECi)) for Hepatitis B surface antigen (HBsAg) and ELISA for tetanus, Pertussis toxoid (PT), Filamentous haemagglutinin (FHA), Fimbriae types 2 \& 3 (FIM) \& Pertactin (PRN). Percentage of participants with an Ab titre ≥1.0 μg/mL for Hib (PRP); ≥0.1 IU/mL; for diphtheria \& tetanus; ≥10 mIU/mL HBsAg; ≥8 (1/dil) for IPV1, 2 \& 3, and seroresponse to PT, FHA, FIM and PRN are reported. 95% confidence interval (CI) were calculated based on the exact binomial method by Clopper and Pearson. The immune response to PR5I vaccine was considered as acceptable if the lower bounds of the 2-sided 95% CI for the response rates were greater than the lower CI limits for PRP, PT, FHA, FIM, and PRN (75%); Diphtheria (80%); HBsAG, IPV 1, 2, 3 (90%).

Percentage of Participants Vaccinated With PR5I Compared With INFANRIX™ Hexa With Acceptable Ab Response Rates to Hepatitis B and Seroresponse to Pertussis Antigens Pt, FHA and PRN One Month After the Toddler Dose at 13 Months Old

Time Frame: One month after Toddler dose of PRI5 (13 months old)

Antibody titres were measured by ECi for HBsAg and ELISA for PT, FHA, \& PRN. Percentage of participants with an Ab titre ≥10 mIU/mL HBsAg; ≥8 (1/dil) for IPV1, 2 \& 3, and seroresponse to PT, FHA, and PRN are reported. The estimated response rates are based on the method by Miettinen and Nurminen stratified by country.

Percentage of Participants Vaccinated With PR5I With Acceptable Antibody (Ab) Response to Haemophilus Influenzae Type b, Diphtheria, Tetanus, and Poliovirus Types 1, 2 & 3, at 5 Months

Time Frame: One month after post-dose 3 of PRI5 (5 months old)

Antibody titres in the PR5I group were measured by Radioimmunoassay (RIA) for Haemophilus influenzae type b (PRP), Micrometabolic inhibition test (MIT) for diphtheria \& poliovirus, and Enzyme-Linked Immunosorbent Assay (ELISA) for tetanus. Percentage of participants with an Ab titre ≥0.15 μg/mL for Haemophilus influenzae type b (Hib) (polyribosylribitol phosphate, PRP); ≥0.01 IU/mL; for diphtheria \& tetanus; ≥8 (1/dil) for inactivated poliovirus types 1, 2 \& 3 (IPV1, 2 \& 3) are reported. 95% confidence interval (CI) were calculated based on the exact binomial method by Clopper and Pearson. The immune response to PR5I vaccine was considered as acceptable if the lower bounds of the 2-sided 95% CI for the response rates were greater than the predetermined lower CI limits for PRP, diphtheria (80%), tetanus (90%), and IPV1, 2 \& 3 (90%).