The educational efforts, lead by the Centers for Disease Control and Prevention (CDC), the World Health Organization (WHO), and the American Health Organization (AHO), along with teachers and other leaders, are focusing on the idea of safer sexual practices and drug-injecting. To prevent HIV through sexual encounters, it is advisable to use plastic and latex condom, and diaphragms, used in conjuction with a spermicide. To diminish the increasing number of AIDS cases due to Injection-Drug-Use (IDU), the efforts have focused on the need to use sterilized or new needles and syringes. A needle or syringe can be sterilized in diluted chlorine bleach. For new needles, many states in the Unites States have created a Needle Exchange Strategy in which a new devise is exchanged for an old one. These programs also provide other supplies, such as cotton, water, sterile alcohol prep pads, and HIV tests. The creation of the programs have helped to reduce HIV transmission among IDUs because drug users have an economic reason to share needles and other equipment.