The acyw 135 Meningococcal Vaccine is not a mandatory vaccine and the choice should be made according to the specific situation of the vaccinated person. acyw 135 rheumatic encephalitis vaccine is mainly for the prevention of epidemic cerebrospinal meningitis caused by infection with Neisseria meningitidis groups A, C, Y, and 135. It is a self-funded vaccine, and our planned immunization policy does not stipulate that this vaccine must be given. Vaccination is generally recommended for children over 2 years of age and adults in high-risk groups. The high-risk groups are mainly: 1. Those who have traveled or live in high-risk areas, such as the endemic areas of Neisseria meningococcal infections of groups A, C, Y and W135 in the Sahara region of Africa. 2. People who have been exposed to Neisseria meningitidis group AcyW135 during vaccine production and laboratory work. 3. People who are at high risk of Neisseria meningitidis group Y and W135 outbreaks as predicted by the National Ministry of Health and the Centers for Disease Control based on epidemiologic investigations. Therefore, if you need to receive this vaccine, you should go to a regular medical institution for vaccination.