Consistency & Immunogenicity Study of 3 Lots of GSK's Hib Conjugate Vaccine Versus ActHIB & Pentacel in Healthy Infants

The purpose of this study is to evaluate safety, to demonstrate lot-to-lot consistency of the vaccine, to address the relevant concomitant vaccine administrations and to provide a comparison between GSK Biologicals' Hib conjugate vaccine and the licensed monovalent Hib vaccine ActHIB as well as the licensed combination product Pentacel in infants at 2, 4, 6 and 15-18 months of age. This study is designed with a primary and a booster phase.

This protocol posting has been updated following protocol amendment 3, dated 12 April 2011. The impacted section is: Eligibility Criteria (Exclusion criteria).

Eligibility Criteria:
Inclusion Criteria:

* Subjects for whom the investigator believes that their parent(s)/Legally Acceptable Representative(s) (LAR\[s\]) can and will comply with the requirements of the protocol (e.g., completion of the diary card, return for follow-up visits).
* A male or female between, and including, 6 and 12 weeks of age at the time of the first vaccination.
* Written informed consent obtained from the subject's parent/LAR.
* Healthy subjects as established by medical history and clinical examination before entering into the study.
* Born after a gestation period of minimum 36 weeks.
* Infants who have not received a previous dose of hepatitis B vaccine or those who have received only 1 dose of hepatitis B vaccine administered at least 30 days prior to enrollment.

Exclusion Criteria:

* Use of any investigational or non-registered product (drug or vaccine) other than the study vaccine(s) within 30 days preceding the first dose of study vaccine, or planned use during the study period.
* Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs since birth.
* Planned administration of a vaccine not foreseen by the study protocol within 30 days of the first dose of study vaccine and until 30 days after the booster dose.
* Previous vaccination against Haemophilus influenzae type b, diphtheria, tetanus, pertussis, Pneumococcus, rotavirus and/or poliovirus; more than one previous dose of hepatitis B vaccine.
* History of Haemophilus influenzae type b, diphtheria, tetanus, pertussis, pneumococcal, rotavirus, poliovirus, and hepatitis B diseases.
* Any confirmed or suspected immunosuppressive or immunodeficient condition based on medical history and physical examination.
* History of allergic disease or reactions likely to be exacerbated by any component of the vaccines, including dry natural latex rubber.
* Major congenital defects or serious chronic illness.
* History of any neurologic disorders or seizures.
* Acute disease at time of enrollment. All vaccines can be administered to persons with a minor illness.
* Administration of immunoglobulins and/or any blood products since birth or planned administration during the study period.
* Concurrent participation in another clinical study, up to 30 days prior to study entry or at any time during the study period, in which the subject has been or will be exposed to an investigational or a non-investigational product (pharmaceutical product or device).
* Child in care.
* History of intussusception.
* History of uncorrected congenital malformation of the gastrointestinal tract that would predispose the infant to intussusception.
* History of Severe Combined Immunodeficiency Disease.