Human Immuno Deficiency Virus

Human Immuno deficiency Virus (HIV) is a lentivirus that attacks the immune system, particularly CD4 T cells, leading to immunodeficiency. HIV is primarily transmitted through unprotected sexual intercourse, sharing of contaminated needles among injecting drug users, and from mother to child during childbirth or breastfeeding. The virus can also be transmitted through blood transfusions and organ transplants from infected donors, although rigorous screening measures have significantly reduced this risk. Upon entering the bloodstream, HIV targets and infects CD4 T cells, key components of the immune system. The virus utilizes the cellular machinery to replicate, leading to a gradual decline in CD4 T cell counts. As the immune system weakens, individuals become susceptible to opportunistic infections and certain cancers. The progression of HIV infection to Acquired Immunodeficiency Syndrome (AIDS) is marked by a CD4 count below 200 cells/mm³ or the development of specific opportunistic infections or cancers. Effective antiretroviral therapy (ART) has transformed HIV infection from a once fatal illness to a manageable chronic condition. ART suppresses viral replication, preserves immune function, and significantly improves the overall health and life expectancy of individuals living with HIV. Early diagnosis, prompt initiation of ART, and consistent adherence to treatment are essential for optimal outcomes. Global efforts to combat HIV/AIDS involve prevention strategies, widespread testing and counseling, access to ART, and addressing social determinants of HIV transmission. Although progress has been made, challenges such as stigma, discrimination, and disparities in access to healthcare persist, emphasizing the need for comprehensive and inclusive approaches in the fight against HIV/AIDS.