Vaccines (1) Vaccination (1) Streptococcus pneumoniae (1) Selling (1) Saving and investment (1) Proportion (1) Prices (1) Population (1) Pneumococcal vaccine (1) Perspective (1) National health services (1) Medical care, Cost of (1) Life (1) Infection (1) Health (1) Dynamics (1) Differential equations (1) Adulthood (1) Streptococcus pneumoniae (1) Vacuna antineumocócica (1) Costes (1) Salud (1) Reducción (1) Edad adulta (1) Vida (1) Estudio (1) Infecciones (1) Vacunas (1) Perspectiva (1) Población (1)