Umar Mallam Abdulkarim , Mathematical Model for Major Mode of HIV/AIDS Transmission, Research Journal of Applied Sciences, Volume 2,Issue 6, 2007, Pages 673-676, ISSN 1815-932x, rjasci.2007.673.676, (https://makhillpublications.co/view-article.php?doi=rjasci.2007.673.676) Abstract: In this study, we developed and examine 3 transmission Dynamics models for 3 major mode of HIV/AIDS transmission. We evaluate the disease-free steady states and examine them for stability. We also compared the 3 mode of transmission to determine which of them is responsible for high level of transmission of the HIV/AIDS. Keywords: Steady state;population dynamics;transmissibility of infection;mortality;life expectancy