This study will be the first of two phases (A and B). Phase A will compare a PCV13-vaccinated setting (SPMC) with an unvaccinated setting (PCMC)
Prospective, observational, hospital based, nasopharyngeal carriage (NPC), vaccine effectiveness study Comparisons will be made in Filipino children, aged 8 weeks to ≤60 months of age at enrollment, who have been hospitalized with a radiologically-confirmed, community-acquired pneumonia (CAP).