1. World Health Organization (WHO) (2023, August 08). Pneumonia in Children. Available online: https://www.who.int/news-room/fact-sheets/detail/pneumonia.
2. World Health Organization (WHO) (2007). Pneumococcal conjugate vaccine for childhood immunization—WHO position paper-2007. Wkly. Epidemiol. Rec., 82, 93–104.
3. Infecciones invasivas por S. pneumoniae: Estudio epidemiológico e importancia del desarrollo de un sistema de vigilancia;Ruvinsky;Arch Argent Pediatr.,2002
4. Centers for Disease Control and Prevention (CDC) (2023, August 08). Pneumococcal Vaccination: What Everyone Should Know, Available online: https://www.cdc.gov/vaccines/vpd/pneumo/public/index.html#print.
5. Pneumococcal conjugate vaccines for preventing vaccine-type invasive pneumococcal disease and X-ray defined pneumonia in children less than two years of age;Lucero;Cochrane Database Syst. Rev.,2009