This website contains HIV and STD prevention messages that may not be appropriate for all audiences. Since HIV and STDs are spread primarily through sexual activity and by sharing needles, information on this site addresses how to reduce the risks of those activities. If you are not seeking such information or may be offended by it, please exit this website. Creation of this site was supported by Cooperative Agreement Number 1U65PS004908-01, funded by the U.S. Centers for Disease Control and Prevention. Its contents are solely the responsibility of the authors and do not necessarily represent the official views of the Centers for Disease Control and Prevention or the Department of Health and Human Services.