The purpose of this study is to evaluate the safety and immunogenicity of an indigenously developed liquid pentavalent (diphtheria, tetanus, pertussis, hepatitis B and Hib) combination vaccine in healthy Indian infants as a part of the routine immunization in accordance with the EPI schedule.

Inclusion Criteria:

• Healthy children in the age group six to eight weeks
• Born after a normal gestational period (36 - 42 weeks)
• Mother's HBsAg assured negative.
• Father, mother or legally acceptable representative properly informed about the study and having signed the informed consent form.
• Parents willing to fill the Diary Card

Exclusion Criteria:

• Administration of immunoglobulin or any blood products since birth.
• Use of any investigational, on-registered drug, or vaccine other than the study vaccine (with the exception of OPV & BCG vaccine) during the study period or within 30 days preceding the first dose of the study vaccine.
• Previous vaccination or evidence of infection with DTP.
• History of allergic disease or reaction likely to be exacerbated by any component of the vaccine including allergy to antibiotics.
• Major congenital or hereditary immunodeficiency.
• Infants having evidence of disease or fever, history of allergic disease or persistent hematological, hepatic, renal, cardiac or respiratory disease and signs of a CNS disorder at the time of vaccination.
• Infants showing any of the following reactions after any dose of study vaccine will be withdrawn for subsequent doses: body temperature more than 40.4 degree Celsius, persistent screaming or crying for 3 hours within 48 hours of vaccination, seizures, encephalopathy and hypersensitivity reaction.
• Parent/s or guardian of subject unable to maintain diary card
• Simultaneous participation in any other clinical study