Elite Journal of Immunology. Volume 2 Issue 7(2024), Pp. 39-50 https://epjournals.com/journals/EJI Citation: Obeagu EI, Akinleye CA, Edoho SH. CD4/CD8 Ratios as Immune Architects: Building Defenses Against HIV. Elite Journal of Immunology, 2024; 2(7): 39-50 1 CD4/CD8 Ratios as Immune Architects: Building Defenses Against HIV * Emmanuel Ifeanyi Obeagu 1 , Callistus Adewale Akinleye 2 and Sussanah Henry Edoho 3 1 Department of Medical Laboratory Science, Kampala International University, Ishaka, Uganda, ORCID: 0000-0002-4538-0161 2 Department of Community Medicine, Osun State University, Osogbo, Nigeria, ORCID: 0000- 0003-3778-3638 3 School of Nursing Science, Kampala International University, Ishaka, Uganda. * Corresponding authour: Emmanuel Ifeanyi Obeagu, Department of Medical Laboratory Science, Kampala International University, Uganda, emmanuelobeagu@yahoo.com, ORCID: 0000-0002-4538-0161 Abstract The CD4/CD8 ratio has emerged as a critical immunological marker in understanding the immune dynamics of individuals living with HIV. This review explores the role of CD4+ T helper cells and CD8+ T cytotoxic cells in shaping immune responses against HIV, emphasizing how alterations in the CD4/CD8 ratio can influence disease progression and treatment outcomes. We discuss the mechanisms that contribute to the inversion of this ratio during HIV infection and its implications for immune recovery, particularly in the context of antiretroviral therapy (ART). In the chronic phase of HIV infection, a decline in CD4+ T cell counts often leads to an increased CD8+ T cell population, resulting in a low CD4/CD8 ratio that signals immune dysregulation and increased susceptibility to opportunistic infections. Regular monitoring of the CD4/CD8 ratio provides valuable insights into the immune status of HIV-infected individuals, guiding clinical decision- making regarding ART efficacy and the need for additional therapeutic interventions. Keywords: CD4/CD8 Ratio, HIV, Immune Response, Antiretroviral Therapy, Immune Health Introduction Human Immunodeficiency Virus (HIV) remains a global health challenge, affecting millions of individuals and necessitating ongoing research into effective management strategies. Among the various immunological markers that have been studied, the CD4/CD8 T cell ratio has gained prominence due to its significant implications for understanding HIV pathogenesis and progression. CD4+ T helper cells play a crucial role in orchestrating the immune response, while