Muli, F.M.M., Benard Okelo, Richard Magwanga and Omolo Ongati 2023. Mathematical Analysis of COVID-19 model with Vaccination and Partial Immunity to Reinfection. Journal of Mathematical Analysis and Modeling. 4, 2 (Dec. 2023), 121–145. DOI:https://doi.org/10.48185/jmam.v4i2.942.