“The Importance of the 23-Valent Pneumococcal Polysaccharide Vaccine (PPSV23) in the Prevention of Pneumococcal Diseases in Brazil”. Electronic Journal Collection Health 13, no. 10 (October 13, 2021): e8981. Accessed November 3, 2026. https://acervomais.com.br/saude/article/view/8981.