Group A+C meningitis vaccine is mainly used to prevent epidemic cerebrospinal meningitis caused by meningococcus group A and meningococcus group C. The vaccine can be divided into polysaccharide vaccine and conjugate vaccine. The ac vaccine can be divided into polysaccharide vaccine and conjugate vaccine. Polysaccharide vaccine is a class I vaccine of the national immunization program, which is free and suitable for children over 2 years old to be vaccinated. The vaccine can effectively prevent the infection of purulent meningitis, because purulent meningitis is a contagious disease, the patient’s condition will often be more serious, and some will have cerebral palsy or epilepsy and other sequelae. So be sure to get vaccinated on time. Babies need to stay in the vaccination unit for 30 minutes after ac vaccination. After the baby is vaccinated, let the baby drink more warm water, take proper rest, pay attention to keep the baby warm and avoid strenuous activities.