DTPa-HBV-IPV/Hib vaccine will be administered at two schedules (i.e. 6-10-14 weeks of age OR 2-4-6 months of age) in infants who were previously vaccinated with hepatitis B vaccine at birth. The duration of the study will be approximately 3 months for each subject who will receive vaccination at 6-10-14 weeks of age and approximately 5 months for each subject who will receive vaccination at 2-4-6 months of age. Intervention name: Diphteria, tetanus, acellular pertussis, hepatitis B, poliovirus types 1, 2, 3 & Haemophilus influenzae type b vaccine
In this study, infants who were previously vaccinated with hepatitis B vaccine at birth will be randomly allocated into two groups:~one group of subjects will receive diphtheria, tetanus, acellular pertussis- hepatitis B virus-inactivated poliovirus/Haemophilus influenzae type b (DTPa-HBV-IPV/Hib) vaccine at 6-10-14 weeks of age~the second group of subjects will receive DTPa-HBV-IPV/Hib vaccine at 2-4-6 months of age