Pneumovax 23 – Pneumococcal Vaccine, Polyvalent Manufacturer: Merck & Co., Inc, – Indication: PNEUMOVAX 23 is indicated for vaccination against pneumococcal disease caused by those pneumococcal types included in the vaccine. PNEUMOVAX® 23 (pneumococcal vaccine polyvalent) package insert (pdf) INDICATION and Safety Information for Prevnar 13 Pneumococcal disease describes a group of infections