Pneumonia vaccines are designed to prevent pneumonia caused by pneumococcal infection. There are two types of pneumonia vaccines, 23-valent and 13-valent, which should not be administered blindly and must be directed by a medical professional. Currently, the commonly used pneumonia vaccines are 23-valent polysaccharide vaccine and 13-valent protein conjugate vaccine, both of which can prevent pneumonia caused by pneumococcal infections. The 23-valent polysaccharide vaccine is suitable for susceptible children and adults over 2 years of age and only needs to be vaccinated once, while the 13-valent protein conjugate vaccine is suitable for infants and young children between 6 weeks and 15 months of age, and a total of 4 injections are required. When receiving the pneumonia vaccine, some patients may have adverse reactions such as pain, redness, swelling and hard nodules in the injection area, weakness and low-grade fever. This vaccine should not be used in patients who are allergic to this vaccine, are on immunosuppressive therapy, have severe pulmonary dysfunction or heart disease. It is also not recommended for pregnant or breastfeeding women. Please follow the instructions of the doctor who administers the vaccine.