This fact sheet provides an overview of pneumonia and other pneumococcal diseases, including disease burden and prevention and treatment measures. It also summarizes the pneumococcal conjugate vaccine (PCV) landscape, including the addition of Serum Institute of India, Pvt., Ltd.'s PCV (PNEUMOSIL®) to the suite of World Health Organization (WHO) prequalified PCVs. Also described are the Phase 3 clinical study results that constituted the pivotal data required for WHO prequalification.