Confirmatory Study of BK1310 in Healthy Infants

Inclusion Criteria: * Healthy infants aged ≥2 and \<43 months at the first vaccination of the study drug (recommended: ≥2 and \<7 months) * Written informed consent is obtained from a legal guardian (parent) Exclusion Criteria: * Possibility of anaphylaxis due to food or pharmaceuticals * With experience of Hib infection, diphtheria, pertussis, tetanus or acute poliomyelitis * With experience of Hib, diphteria, pertussis, tetanus or polio vaccination. * Participated in other studies within 12 weeks before obtaining consent * Considered to be not eligible by the principal investigators (sub-investigators) of the enrollment Additional screening criteria check may apply for qualification.