Can pneumonia vaccine prevent bronchitis?

Pneumonia vaccine is commonly used in clinical practice at present, mainly to prevent the recurrence of pneumonia caused by pneumococcal infection. Because the main pathogen of pneumonia in clinical practice at this stage is pneumococcus, pneumonia vaccine is still ideal for prevention of pneumonia. However, the main pathogens of bronchitis are respiratory viruses such as influenza virus, respiratory syncytial virus, herpes virus and other pathogenic bacteria, often Haemophilus influenzae, Streptococcus pneumoniae, Moraxella catarrhalis, mycoplasma and chlamydia. Because pneumococcus is not the main pathogen of bronchitis, pneumonia vaccine is not very effective in preventing bronchitis.