Meningococcal disease refers to any illness that is caused by Neisseria meningitidis bacteria. There are at least 12 types of N. meningitidis, called “serogroups.” Serogroups A, B, C, W, and Y cause most meningococcal disease. These bacteria live in the back of the nose and the throat without being ill, sometimes the bacteria invade the body and cause certain illnesses, which are known as meningococcal disease and are spread from person to person by sharing respiratory secretions.
Vaccine
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