Ogunmodimu, M.O., T.T. Yusuf, and O. Olotu. 2025. “Sensitivity and Stability Analyses of COVID-19 Model With Waning Immunity and Relapse: A Case Study of Nigeria”. International Journal of Mathematical Analysis and Modelling 8 (1). https://tnsmb.org/journal/index.php/ijmam/article/view/220.