Safety Study of 2 Formulations of GSK's Human Rotavirus (HRV) Vaccine (444563), in Healthy Infants Starting at Age 6-12 Weeks

Inclusion Criteria: All subjects must satisfy all the following criteria at study entry: * Subjects' parent(s)/LAR(s) who, in the opinion of the investigator, can and will comply, with the requirements of the protocol (e.g. completion of the diary cards, return for follow-up visits). * Written or witnessed/thumb printed informed consent obtained from the parent(s)/LAR(s) of the subject prior to performance of any study specific procedure. * Healthy subjects as established by medical history and clinical examination before entering into the study. * A male or female between, and including, 6 and 12 weeks (42-90 days) of age at the time of the first vaccination. Exclusion Criteria: Medical conditions * Uncorrected congenital malformation (such as Meckel's diverticulum) of the gastrointestinal tract that would predispose for Intussusception (IS). * Very prematurely born infants (born ≤28 weeks of gestation). * History of IS. * Family history of congenital or hereditary immunodeficiency. * Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination (no laboratory testing required). * Hypersensitivity to latex. * Major congenital defects or serious chronic illness, as assessed by the investigator. * Previous confirmed occurrence of Rotavirus Gastroenteritis (RV GE). * History of any reaction or hypersensitivity likely to be exacerbated by any component of the vaccines. * History of Severe combined immunodeficien…