The 13-valent pneumonia vaccine is mainly used to prevent pneumococcal diseases caused by 13 serotypes of Streptococcus pneumoniae, such as pneumonia, meningitis, and acute otitis media. However, pneumonia is caused by different types of pathogenic infections and can be caused by other bacteria, viruses, and certain specific pathogens in addition to Streptococcus pneumoniae, so the 13-valent pneumonia vaccine cannot completely prevent the formation of pneumonia. The 13-valent pneumonia vaccine does not prevent pneumonia, and some patients may also develop Streptococcus pneumoniae pneumonia due to the expiration date of the vaccine.