Evimar 13 is a 23-valent pneumococcal polysaccharide vaccine designed to provide active immunization against pneumococcal diseases caused by 23 serotypes of Streptococcus pneumoniae. These diseases include pneumonia, meningitis, otitis media, and bacteremia. The vaccine is formulated with purified capsular polysaccharide antigens from the following serotypes: 1, 2, 3, 4, 5, 6B, 7F, 8, 9N, 9V, 10A, 11A, 12F, 14, 15B, 17F, 18C, 19F, 19A, 20, 22F, 23F, and 33F.