serogroups Serogroup B Meningococcal Disease National Meningitis Association NMA outbreaks occurred A, C, W, Y and B A, C, W, Y and B Serogroup B Meningococcal Disease experienced outbreaks Serogroup B Meningococcal Disease A, C, W, Y and B National Meningitis Association NMA Serogroup B Meningococcal Disease A, C, W, Y and B Serogroup B Meningococcal Disease