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Sex education
Sex and HIV education programs have multiple goals: to decrease unintended pregnancy, to decrease STDs including HIV and to improve sexual health among youth. In 2005, almost two-thirds (63%) of all high school seniors in the US had engaged in sex, yet only 21% of all female students used birth control pills before their last sex and only 70% of males used a condom during their last sexual intercourse. In 2000, 8.4% of 15-19 year old girls became pregnant, producing one of the highest teen pregnancy rates in the western industrial world. Persons aged 15-24 had 9.1 million new cases of STDs in 2000 and made up almost half of all new STD cases in the US. There are numerous factors affecting adolescent sexual behavior and use of protection. Some of these factors have little to do with sex, such as growing up in disadvantaged communities, having little attachment to parents or failing at school. Other factors are sexual in nature, such as beliefs, values, perceptions of peer norms, attitudes and skills involving sexual behavior and using condoms or contraception. It is these sexual factors that sex/HIV education programs can potentially affect, thereby impacting behavior. Sex/HIV education programs alone cannot totally reduce sexual risk-taking, but they can be an effective part of a more comprehensive initiative.
HIV vaccine
Vaccines are among the most powerful and cost-effective disease prevention tools available. A vaccine that could prevent HIV infection or stop progression of the disease would greatly help in the fight against the AIDS pandemic. Vaccines have been pivotal in worldwide smallpox elimination efforts, have nearly eliminated polio and have drastically reduced the incidence of infectious diseases like measles and pertussis in the US. A crucial question is whether a vaccine based on one strain of HIV would be effective for populations in which a different strain is predominant. There are also questions about how an HIV vaccine would protect individuals: the vaccine might not be able to actually prevent infection, but could prevent or delay progression to disease, or simply reduce the infectiousness of people who do become infected with HIV. HIV prevention education and counseling are important components of vaccine programs. Even after the release of a vaccine, there will be an ongoing need for effective behavioral prevention programs. An HIV vaccine will not be a “magic bullet” but it could play an extremely powerful role as part of a package of prevention interventions.