Trivalent pneumonia is known as 13-valent pneumococcal conjugate vaccine. 13-valent pneumococcal conjugate vaccine usually requires four doses. The vaccine is usually given at the age of 2, 4, and 6 months for basic immunization, and at 12-15 months for a booster dose. The vaccination interval should be 4-8 weeks; if the first vaccination has not been given to children over 6 months of age, the subsequent booster vaccination will have very limited immune effect and is not recommended. After the injection, try to ensure that the infant and child have enough rest and drink more water to help metabolism. When itching occurs at the injection site, care should be taken to prevent children from scratching to avoid adverse consequences such as skin lesions at the needle holes and wound infections. The injection site may become erythematous, feverish, swollen, painful and other adverse reactions after vaccination, which are common after vaccination. If symptoms persist, or if more serious reactions such as high fever, edema, or children crying and fussing occur, go to the hospital for examination and treatment in a timely manner. The 13-valent pneumococcal conjugate vaccine can help infants and children to have active immunity against diseases caused by common types of Streptococcus pneumoniae infections. It is effective against diseases such as meningitis and septicemia, but is not usually effective against pneumonia caused by other pathogens.