MenB refers to Meningococcal B disease, a serious bacterial infection caused by the bacterium Neisseria meningitidis type B. It can lead to meningitis, an inflammation of the protective membranes covering the brain and spinal cord, and septicemia, a life-threatening bloodstream infection. Symptoms often include fever, headache, stiff neck, and a rash. Vaccination is the primary method of prevention against MenB. Several vaccines are available, such as Bexsero and Trumenba, which help protect individuals, especially adolescents and young adults, who are at higher risk. Early recognition and treatment are crucial for improving outcomes in affected individuals.