The differences between the 13-valent pneumococcal vaccine (i.e. 13-valent pneumococcal vaccine) and the 23-valent pneumococcal vaccine (i.e. 23-valent pneumococcal vaccine) lie in the number of types of bacteria to be prevented, the age of vaccination, and the immunization effect. 1. Number of bacterial species: 13-valent pneumococcal vaccine can only prevent 13 types of Streptococcus pneumoniae, while 23 types of Streptococcus pneumoniae can be prevented by the 23-valent pneumococcal vaccine, so the 23-valent pneumococcal vaccine can prevent more types of bacterial species. 2. Vaccination age: Thirteen-valent pneumococcal vaccine is suitable for babies over half a year old and up to 15 months old; Twenty-three-valent pneumococcal vaccine is suitable for babies over 2 years old. 3. Immunization effect: Thirteen-valent pneumococcal vaccine is a polysaccharide combination vaccine, while twenty-three-valent pneumococcal vaccine is a polysaccharide vaccine with a single immunization mechanism, and the immunization effect is worse than that of thirteen-valent pneumococcal vaccine. There are many differences between the thirteen-valent pneumococcal vaccine and the twenty-three-valent pneumococcal vaccine, and it is recommended that you choose the appropriate vaccination according to your baby’s age.