Immune System - The system of biological structures and processes that protects the body from foreign substances, including pathogens.⏎
Meningeal Infection - An infection of the protective membranes that cover the brain and spinal cord, known collectively as the meninges.⏎
Infection - The entry, establishment, and replication of pathogens inside a host organism.⏎
Morbidity - The relative occurrence of a disease or a condition that causes illness.⏎