Evaluation of Effectiveness of GSK Biologicals' Pneumococcal Conjugate Vaccine 1024850A Against Invasive Disease

The aim of this study is to assess the effectiveness of GSK Biologicals' pneumococcal conjugate vaccine (GSK1024850A), administered according to different vaccination schedules, against invasive disease caused by S. pneumoniae or H. influenzae as well as vaccine impact on the occurrence of hospital-diagnosed pneumonia cases, tympanostomy tube placement and outpatient antimicrobial prescriptions. This study will also explore vaccine impact on occurrence of respiratory tract infections (RTIs), including acute otitis media (AOM) in a subset of children in Turku area.