Arts & Entertainment
HIV/AIDS Prevention Options
Originally printed 12/5/2013 (Issue 2149 - Between The Lines News)
HIV prevention has become a twisted mire of ideas and science. But most of the LGBT community has heard only one clear message about preventing HIV: use a condom, correctly and consistently every time you have sex. But new prevention tools and technology, as well as techniques are here. In order to discuss them, we need a common language. Here is an explanation of various risk reduction technologies and their effectiveness in reducing risk
Treatment as Prevention - Following a large scale study of heterosexual couples in Africa where one partner was HIV-positive and the other was not, it was determined that a person on a medication regime that had successfully suppressed the viral load - the measure of virus in the blood - there was a 96 percent reduction in transmission of HIV. As a result the federal government has been scaling up treatment for people living with HIV who are aware of their status as a prevention tool.
PrEP - this is the use of Truvada, a combination pill of two powerful anti-HIV drugs, taken daily to prevent infection in HIV-negative persons. It has been approved for use in men who have sex with men, as well as intravenous drug users and women at high risk. It has been proven to be as much as 72.9 percent effective in preventing infection when taken more than 90 percent of the time.
n-PEP - this intervention is the use of three or more anti-HIV drugs taken for 28 days following an exposure to HIV to prevent infection. The regime must be initiated within 72 hours of the exposure to be successful. No studies provide solid answers on the effectiveness of this intervention, but it is estimated to be 81 percent effective in preventing an infection.
Tools and Technology
Rectal mircobicides - Scientists are working feverishly to develop drug related interventions which can be applied in the anus or the vagina and prevent an infection. Some trials have proven of interest, but nothing has been approved.
Female Condoms - This is a condom that is inserted in either the anus or the vagina. It is large, and loose fitting and looks like a pocket. Ironically, this was originally designed for anal sex, however, the FDA declined to approve it for that use. Instead makers repurposed the product as a vaginal insert and it was approved. This is currently an off-label use, although several pocket or pouch condoms specifically for anal sex are working their way through the FDA approval process.
Rapid HIV Testing - Those who are infected, but unaware of the infection are significantly more likely to transmit their infection to another. As a result, testing for HIV antibodies is a key tool in preventing HIV. The CDC recommends men who have sex with men be tested every three months for HIV. Knowing one's status, whether positive or negative, is key in preventing transmission and creating prevention options for people.
Sero-sorting - this is where a person says he or she will only engage in sexual activity, whether condomless or not, with a person of the same HIV status. In theory this should be effective in preventing new transmissions, however, with the low testing rates and knowledge of actual HIV status in the MSM community, it is not very effective. A study released in 2012 at the 19th annual Conference on Retroviruses and Opportunistic Infections found this option had a 51 percent reduction in HIV infections.
Condoms-only/no anal sex--This category is pretty self-explanatory and was found to be 74 percent effective in reducing HIV infections in the 2012 study. However, a 2013 study from CROI found that condoms are only 70 percent effective in preventing HIV infections, and only if used every time. Inconsistent condom use had no prevention effect.
Sero-positioning - In this risk reduction option, a man who has sex with men determines whether to be top or bottom based on the HIV-status of his partner. The person using sero-positioning, will opt to top for those who are HIV-positive or whose HIV status is unknown or a test is out of date. It was found in the 2012 study to be 75 percent effective in reducing infections.
Top-only - Those who are tops-only during anal sex have 86 percent reduction in transmission, according to the 2012 CROI study. This may have something to do with the already low probability risk of insertative anal sex - estimated at .065 percent for a one time sexual episode for a top by the CDC.
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