Serogroup B refers to a classification of the bacterium Neisseria meningitidis, which is known to cause meningococcal disease. This serogroup is one of several types of the bacteria, and it is particularly notable for its association with severe infections, including meningitis and septicemia. Vaccines targeting serogroup B have been developed to help prevent these infections, as the bacteria can spread through respiratory droplets. The emergence of serogroup B as a significant public health concern has led to increased awareness and vaccination efforts, especially in populations at higher risk, such as adolescents and young adults.