Costa Rica (1) Public health surveillance (1) Minors (1) Vaccines (1) Streptococcus pneumoniae (1) Radiography (1) Pneumonia in children (1) Pneumonia (1) Pneumococcal vaccine (1) Penicillin (1) Months (1) Justification (Christian theology) (1) Forecasting (1) Cocktails (1) Children (1) Antibiotics (1) Vigilancia epidemiológica (1) Streptococcus pneumoniae (1) Neumonía en niños (1) Vacuna antineumocócica (1) Meses (1) Prospectiva (1) Penicilina (1) Neumonía (1) Justificación (1) Cócteles (1) Vacunas (1) Datos (1) Niños (1) Menores (1)