Stability analysis andB ifurcation for an Bacterial Meningitis S preadingwith S tage S tructure : Mathematical M odeling. Iraqi Journal of Science [Internet]. 2024 May 30 [cited 2025 Apr. 6];65(5):2630-48. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/9328