Researchers on Monday at the International Microbicides Conference (M2010) in Pittsburgh continued to present data on HIV prevention research, Reuters reports. The news service outlines several prevention methods being researched, including an intravaginal ring that over time releases two antiretrovirals (ARVs) - dapivirine and maraviroc - for up to a month, and a vaginal tablet that time-releases the antiretrovirals dapivirine and DS003 for up to 12 hours. Both methods have yet to reach clinical trials... 
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