13-valent pneumonia is called 13-valent pneumococcal vaccine, and 23-valent pneumonia is called 23-valent pneumococcal vaccine. The difference between the two lies in the number of preventive bacterial species, the age of vaccination, and the immunization effect. 1. The number of preventive bacterial species: from the literal meaning, 13-valent pneumococcal vaccine can prevent 13 types of Streptococcus pneumoniae, and 23-valent pneumococcal vaccine can prevent 23 types of Streptococcus pneumoniae, which can prevent more types of bacteria than the 13-valent pneumococcal vaccine. 2. Vaccination age: If the baby is over half a year old and within 15 months, he/she can receive 13-valent pneumococcal vaccine; if the baby is over 2 years old, he/she can receive 23-valent pneumococcal vaccine. 3. Immunization effect: 13-valent pneumococcal vaccine belongs to polysaccharide combined vaccine, the immunization effect is better than 23-valent pneumococcal vaccine because 23-valent pneumococcal vaccine belongs to polysaccharide vaccine, the immunization mechanism is relatively single. If you want to know the difference between the 13-valent pneumococcal vaccine and the 23-valent pneumococcal vaccine, you can go to the hospital to consult the doctor.