When spotted early, many Sexually transmitted diseases are easily curable or treatable. HIV (human immunodeficiency infection) is a virus that attacks the body's body immune system, destroying the CD4 cells (also called T cells). It is mainly spread by having vaginal or rectal sex or sharing injection medication devices with somebody that has HIV. With time, HIV damages the body's capability to combat off infections and also condition. Herpes is an usual viral infection that is brought on by the herpes simplex infection (HSV).