Evaluate Protective Efficacy of Diff Strengths of Human Rotavirus Vaccine After Admn of 2 Doses to Infants Aged 2 Months

Inclusion Criteria: * Healthy male or female infant between, and including, 6 and 12 weeks of age born after a gestation period of 36 to 42 weeks or a birth weight of \>2000g. * Written informed consent obtained from the parent or guardian of the subject. Exclusion Criteria: * Planned administration of oral polio vaccine during the period starting from 2 weeks before each dose of study vaccine(s) and ending 2 weeks after. * Any confirmed or suspected immunosuppressive or immunodeficient condition, including human immunodeficiency virus (HIV) infection * History of diphtheria, tetanus, pertussis, Hib disease and/ or hepatitis B. * Previous vaccination against diphtheria, tetanus, pertussis, and/or Haemophilus influenzae type b. * History of allergic disease * Any clinically significant history of chronic gastrointestinal disease including any uncorrected congenital malformation of the GI tract or other serious medical condition as determined by the investigator. * Gastroenteritis within 7 days preceding the study vaccine administration (warrants deferral of the vaccination) * Previous confirmed occurrence of RV GE. * Household contact with an immunosuppressed individual or pregnant women. * Administration of immunoglobulins and/or blood products since birth or planned administration during the study period