Meningococcal vaccine is suitable for children, adolescents, people living in areas at high risk of meningococcal disease and people who are about to travel to areas at high risk of meningococcal disease. There are many types of vaccines, including polysaccharide vaccines and conjugate vaccines. Some of these vaccines belong to China’s Class I vaccines and are free of charge for people of the appropriate age. For example, group A meningococcal vaccine (group A meningococcal polysaccharide vaccine) is free for children and adolescents between the ages of 6 months and 15 years. Meningococcal Polysaccharide Vaccine Group a Group c is also a free vaccine for children aged 2 years and above, students, and travelers who will be going to areas where meningitis is endemic. There are also self-funded meningitis vaccines, such as the acyw quadrivalent meningitis vaccine, which is available for children aged 2 years and above who are at high risk of meningococcal infection with the acyw group at their own expense.