How do vaccines help control meningitis outbreaks?

Meningitis can be caused by different pathogens, including bacteria such as Neisseria meningitidis and Streptococcus pneumoniae, as well as some viruses. Vaccines lower the chance of infection and can also reduce carriage in the throat, which helps interrupt spread. In outbreak settings, rapid vaccination is often combined with surveillance and antibiotic treatment for close contacts. The meningococcal vaccines have been especially important in the African meningitis belt, where epidemics have historically been severe. Prevention matters because bacterial meningitis can progress quickly and cause death or brain injury.