El SIDA es ocasionado por un retrovirus VIH, de transmisión sexual y transfusión sanguínea, se presenta en varias fases y lleva a la muerte. Adolescencia, infecciones de transmisión sexual, delitos sexuales, ley. The most common STD found are gonorrhea, syphilis and trichomoniasis HVP, syphilis and trichomoniasis have also other routes of transmition. AIDS is caused by a retrovirus, the HIV, it can be adquired by either sexual or blood transmition, it has several phases and now a days it can be considered a chronic disease but in log terms it will eventually cause death. Within the effective prevention methods we have abstinence and condoms. Reports have shown the innefficiency of the nonoxinol-9 gels, the vaccine of HPV is still under investigation phases. Within the legal frame, it exist a crime penalty for the propagation of infectious diseases, the best traslation for the crime will be venereal contagion or venereal transmition. There is also the law refering to AIDS.