Immunogenicity and Safety of Pentaxim as 3 Doses Primary Vaccination Followed by a Booster Dose at 18 Months

As per request by the Heath Authorities, the present clinical study will assess the immunogenicity and safety of sanofi pasteur's DTacP-IPV// PRP~T combined vaccine (PENTAXIM™) as a three-dose primary vaccination at 2, 3, and 4 months of age or 3, 4 and 5 months of age followed by a booster dose at 18-20 months of age as compared to commercially available DTacP, Hib conjugate (Act-HIB™) and IPV (IMOVAX Polio™) monovalent vaccines in order to meet the requirements for registration of the product in People's Republic of China.