Hepatitis C Virus (HCV): HCV is usually transmitted through blood and rarely through other body fluids, such as semen HCV progresses more rapidly in people coinfected with HIV than in people with HCV alone (AIDSinfo) Human Immunodeficiency Virus (HIV HIV is a retrovirus that attacks the body’s immune system, making people who have transmitted HIV potentially vulnerable to other infections and diseases If untreated with antiretroviral medications, HIV can progress to AIDS (see above) People with either HIV or AIDS can lead healthy lives if they receive ART and appropriate routine medical care (NYC DOHMH)