Vaccines can aid in the prevention of meningococcal disease, which is any sickness caused by the bacteria Neisseria meningitis. Meningococcal conjugate vaccines (Menactra, Menveo, and MenQuadfi) and meningococcal conjugate vaccines (Menactra, Menveo, and MenQuadfi) are the two types of meningococcal vaccines available in the United States.