Hib-MenCY-TT Vaccine Study Compared to Licensed Hib and Meningococcal Serogroup C Conjugate Vaccines

This study is evaluating the safety and immunogenicity of Hib-MenCY-TT vaccine compared to control groups receiving licensed Hib or MenC conjugate vaccines, each administered at 2, 4, 6, and 12 to 15 months of age. Co-administration with live, attenuated measles, mumps, and rubella combination vaccine; and with live, attenuated varicella vaccine will be assessed with administration of the booster dose. The Protocol Posting has been updated in order to comply with the FDA Amendment Act, September 2007.

The study will be conducted in 2 stages: a 3-dose primary vaccination at 2, 4 and 6 months of age and a booster vaccination at 12 to 15 months of age. All subjects will have 3 blood samples taken. Half of the subjects of each group will have a blood sample taken just prior to the administration of the third dose of the primary vaccination and the other half of the subjects of each group will have a blood sample taken at one month after the third vaccine dose of the primary vaccination phase. In addition, all subjects of all groups will have a blood sample taken before and 42 days after administration of the booster dose.

Eligibility Criteria:
Inclusion Criteria:

* Subjects for whom the investigator believes that their parents/guardians can and will comply with the requirements of the protocol should be enrolled in the study.
* 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 parent or guardian of the subject.
* Free of obvious health problems as established by medical history and clinical examination before entering into the study.
* Born after a gestation period between 36 and 42 weeks.

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/ administration of a vaccine not foreseen by the study protocol within 30 days of the first dose of vaccine(s).
* Previous vaccination against Neisseria meningitidis, Haemophilus influenzae type b, diphtheria, tetanus, pertussis, poliovirus, and/or Streptococcus pneumoniae; more than one previous dose of hepatitis B vaccine. Vaccination with hepatitis B at birth is accepted (although not mandatory). Influenza vaccination is allowed 30 days after administration of the third vaccine dose to 30 days preceding the booster dose.
* History of Neisseria meningitidis, Haemophilus influenzae type b, diphtheria, tetanus, pertussis, hepatitis B, poliovirus, Streptococcus pneumoniae and/or varicella invasive disease.
* 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 vaccine(s), including dry natural latex rubber, tetanus toxoid, diphtheria toxoid, neomycin, polymyxin.
* Major congenital defects or serious chronic illness.
* History of any neurologic disorders or seizures.
* Acute disease at the time of enrolment.
* Administration of immunoglobulins and/or any blood products since birth or planned administration during the study period.
* Additional specific criteria for the booster part of the study
* History of or previous vaccination against measles, mumps, rubella or varicella.
* Previous booster vaccination with Hib or meningococcal serogroup C vaccine since the last visit of the primary phase.