Meningococcal polysaccharide vaccine

The meningococcal polysaccharide vaccine is a shot that helps protect against meningococcal disease, a serious bacterial infection that can cause meningitis and bloodstream infections. It works by prompting your immune system to recognize and fight the bacteria if exposed. The vaccine contains pieces of the bacteria's outer shell (polysaccharides), stimulating an immune response without causing illness. It is often recommended for adolescents, travelers to high-risk areas, or certain groups at increased risk. While effective, it mainly provides short-term protection and may not induce long-lasting immunity like other types of meningococcal vaccines.