Cdc report on sex
If on the other hand, someone continues having sex with multiple partners, their infection risk does not diminish over time because their chances of encountering someone with a high viral load stays constant — and therefore so does the efficacy of condoms. Related stories from Sacramento Bee. Sixteen percent of young black men ages 15 to 24 reported at least one HIV risk-related sexual behavior, compared with 8. Poorer men were also more likely to engage in risky behaviors. The findings add to the proof about the progress that is going on in lowering risky behavior by teens who are using marijuana , drinking alcohol, smoking cigarettes, becoming pregnant at a rate lower than teenagers from a decade ago. During their work on the present analysis, the researchers looked at another analysis of the four studies that was published in Scott.
That's sad, and disturbing," he said. Counting the number of partners may be a more reliable guide to risk than counting sex acts. Project Explore , a large study of a behavioural intervention to reduce risky sex in gay men in two US cities. One is that the new analysis examines condom efficacy in four different studies, whereas the previous ones only looked at a single study Detels or two Smith. The report does not speculate on the cause of the drop-off, but some experts cite more effective and direct sex education as a contributing factor. Studies varied in length but all lasted at least 18 months. All of these studies collected data on the difference in the number of HIV infections in HIV-negative gay men who had anal sex with partners known or perceived to have HIV and either always used a condom or used them never or sometimes. This may be due to variation in viral load: Scott HM et al. Some of the public health messages might be getting through. Teen pregnancy and childbearing among U. Because there is less risk of infection as time goes on, the risk of not using condoms also diminishes over time — and so, therefore, does their apparent efficacy. Discussion and comments Why the differences between studies, and between partner numbers? Tracking students grades in 29 states, the questionnaire included one lone question: Two previous analyses, one published back in Detels and the other in Smith found that they only stopped seven out of ten infections. For example, men who had recently been in prison were more likely to report engaging in one or more HIV risk behaviors, compared with other men, the researchers found. Smith DK et al. This is because in cases where there are multiple sex acts between one couple, the risk tends to go down with time: Sten Vermund, director of the Institute of Global Health at Vanderbilt University School of Medicine in Nashville, said that the data used was "a highly valid sample of the American population. There was a considerable difference in efficacy between the studies, however. It produced modest reductions in sexual risk-taking. The rate of students who have had sex dropped from about 47 percent to about 41 percent during the year span. Sixteen percent of young black men ages 15 to 24 reported at least one HIV risk-related sexual behavior, compared with 8. The risk of infection per sex act was 0. The data in the report was collected on almost 23, men and women aged 15 to 44 in households throughout the country and represents 6. In some states, the rate decreased significantly for students in grades , but not The ranks of those engaging in a risky sexual or drug-related behavior dropped from 13 percent of men and 11 percent of women in to 10 percent and 8 percent, respectively, in , according to the U.
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