UK Health Security Agency figures reveal a “deeply worrying” rise in invasive meningococcal disease (IMD) cases, with 378 recorded in 2024-25, up from 340 the previous year. Over 82 per cent of these cases were caused by the MenB strain, predominantly affecting babies, young children, teenagers, and young adults, including all 65 cases in 15 to 19-year-olds.