This product is made from polysaccharide antigens of Neisseria meningitidis serogroup A, C, Y and W135 extracted and purified from the corresponding culture solution, which are mixed, added with adequate stabilizer, and freeze-dried.

At present, this product is only recommended for high-risk groups of children above the age of 2 and adults under the following circumstances: 1. People travelling to or inhabitants of high-risk regions, such as Sub-Saharan Africa (epidemic areas of Neisseria meningitidis serogroup A, C, Y and W135); 2. People engaged in laboratory or vaccine production work, who may have contact with Neisseria meningitidis serogroup A, C, Y and W135 in air; or 3. Based on epidemiological surveys, the high-risk groups in regions with outbreak of Neisseria meningitidis serogroup Y and W135 predicted by the state health administration. This product is used to prevent epidemic cerebrospinal meningitis caused by Neisseria meningitidis serogroup A, C, Y and W135.