Complement Component 5 Deficiency, also known as c5 deficiency, is related to meningitis and malaria. An important gene associated with Complement Component 5 Deficiency is C5 (Complement C5), and among its related pathways/superpathways are Innate Immune System and GPCR downstream signalling. Affiliated tissues include whole blood and t cells, and related phenotypes are recurrent meningococcal disease and reduced hemolytic complement activity