The epidemic encephalitis vaccine is not required every year. The epidemic encephalitis vaccine requires four doses. According to the National Immunization Program (NIP), the first dose of epidemic encephalitis vaccine is given at 6 months to 18 months after birth, followed by the second dose at an interval of three months, and the third dose at three weeks of age for booster immunization, and then the fourth dose at six weeks of age, which is not required every year. After the vaccination against epidemic encephalitis, pay attention to the child to take good protective measures, and do not touch the eye of the needle with water for a short period of time, so as not to cause local infection. At the same time, you need to keep your child warm to avoid catching a cold, which may affect the effectiveness of the vaccine. Parents should actively complete the vaccination of their children against epidemic encephalitis in accordance with the relevant vaccination regulations, and consult the doctor for details.