This study will evaluate the safety, reactogenicity and immunogenicity of a booster dose of the pneumococcal conjugate vaccine, co-admin with a 1st dose or a 2nd dose of MMRV vaccine at 12-14 or respectively 14-16 months of age in children primed with the pneumococcal conjugate vaccine in study 105553. Antibody persistence will be evaluated at 8-10 months after completion of the 3-dose immunization course in study 105553. The immunogenicity, safety and reactogenicity of the 1st and 2nd dose of MMRV vaccine will also be evaluated when co-admin with the pneumococcal conjugate vaccine between 12-16 months of age. The study has 3 groups. * The 1st group will receive the booster dose of pneumococcal conjugate vaccine + 1st dose of MMRV vaccine at 12-14 mo of age and the booster dose of Infanrix hexa™+ 2nd dose of MMRV vaccine at 14-16 mo of age. * The 2nd group will receive the booster dose of Infanrix hexa™ + 1st dose of MMRV vaccine at 12-14 mo of age and the booster dose of pneumococcal conjugate vaccine + 2nd dose of MMRV vaccine at 14-16 mo of age. * The 3rd group will receive the booster dose of pneumococcal conjugate vaccine + the booster dose of Infanrix hexa™ at 12-14 mo. Subjects will be offered one dose of Priorix™ and Varilrix™ at 14-16 mo of age, outside the study.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
390
GSK Investigational Site
Helsinki, Finland
GSK Investigational Site
Jarvenpaa, Finland
GSK Investigational Site
Oulu, Finland
GSK Investigational Site
Pori, Finland
GSK Investigational Site
Tampere, Finland
GSK Investigational Site
Turku, Finland
GSK Investigational Site
Vantaa, Finland
GSK Investigational Site
Vantaa, Finland
Post vacc: rectal fever >39°C
AEs/ SAEs (42 days/up to 6 mo post last vacc); prior & 42-56 days post vacc: immune response to pneumo & MMRV vaccines antigens.
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