Kashihalwa , Simon Pombili, Lilian Pazvakawambwa, and Josua Mwanyekange. 2023. “Estimating the Duration of the Sojourn and the Change in Clinical Conditions for HIV Patients Receiving ART Follow-up in Namibia”. Research and Applications Towards Mathematics and Computer Science Vol. 3, August, 13-30. https://doi.org/10.9734/bpi/ratmcs/v3/5990C.