This chart has now been completely updated. Using full-color illustrations and succinct text, the chart: . Defines HIV (Human Immunodeficiency Virus) and AIDS (Acquired Immunodeficiency Syndrome) . Describes risk factors and how HIV is transmitted . Illustrates and explains the steps in the HIV lifecycle . Describes and graphs what happens to T-cells and HIV RNA during the stages of HIV infection, from the acute stage to advanced HIV . Lists signs and symptoms and briefly explains testing and treatments . Describes symptoms and shows locations of several AIDS-related diseases Size: 20" W x 26" L