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CDC Researchers Publish Estimate of Effectiveness of Condom Use for Gay Men

A paper published this month in the Journal of Acquired Immune Deficiency Syndromes finally makes publicly available a study-- originally reported nearly 2 years ago from the 2013 Conference on Retroviruses and Opportunistic Infections but until now unobtainable even as an abstract -- which gives an estimate for the effectiveness of 100% condom use as the strategy of choice for the prevention of HIV infection among gay men. The CDC researchers estimate that condoms used consistently stop 7 out of 10 HIV infections acquired through anal sex between men.

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Neutralizing Antibodies from Llamas Provide Clues for HIV Vaccine Research

Heavy-chain broadly neutralizing antibodies produced by llamas can neutralize a wide range of circulating HIV virus strains, suggesting that immunization could potentially induce protective antibodies against HIV in humans, according to a report in the December 18 edition of PLoS Pathogens.

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No New HIV Infections Seen Among San Francisco Kaiser PrEP Users

No new HIV infections have occurred among more than 500 Kaiser Permanente San Francisco members using pre-exposure prophylaxis -- better known as PrEP -- but condom use appears to be declining among a subset of gay men, according to a small survey presented at a December 1 forum commemorating World AIDS Day.

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CDC Collaboration Issues New Prevention Recommendations for People with HIV

The U.S. Centers for Disease Control and Prevention (CDC), in collaboration with several government, professional, and non-profit organizations, last week issued updated recommendations about biomedical, behavioral, and structural interventions to help people with HIV reduce the risk of onward transmission of the virus.

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Semen May Enhance HIV Infectivity and Impair Microbicide Effectiveness

A component in semen appears to increase the likelihood of sexual transmission of HIV, and furthermore may enable the virus to over-power topical microbicides designed to prevent infection, according to a study published in the November 12 edition of Science Translational Medicine. This may be one of the factors explaining why drugs that block HIV infection in laboratory experiments have not worked in real-world settings, the researchers suggested.

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