This clinical trial is focused on studying a disease called meningococcal meningitis, which is a serious infection that affects the protective membranes covering the brain and spinal cord. The study is testing a vaccine known as MenABCWY, which is designed to protect against several groups of bacteria that can cause this disease. The vaccine is given as an injection and is being tested to see how well it works and how safe it is for use in healthy adolescents aged 11 to 14 years.
The purpose of the study is to understand the immune response, which is how the body defends itself against infections, to two doses of the MenABCWY vaccine. The study will look at different schedules for giving the vaccine, specifically at 0 and 24 months, and at 0 and 48 months. Participants will receive the vaccine through an injection into the muscle, and the study will monitor their health and any reactions to the vaccine over time.
Throughout the study, participants will be observed for any side effects or reactions to the vaccine. The study aims to ensure the vaccine is safe and to measure how well it helps the body build protection against the bacteria that cause meningococcal meningitis. This research is important for developing effective vaccines to prevent this serious disease in young people.



Germany