HIV Study Named Year's Best

Science taps a clinical trial that showed the benefits of antiretroviral treatment in HIV patients as 2011's breakthrough of the year.

Bob Grant
Bob Grant

Bob Grant is Editor in Chief of The Scientist, where he started in 2007 as a Staff Writer.

View full profile.


Learn about our editorial policies.

Dec 23, 2011

Scanning electron micrograph of HIV-1 budding (in green) from cultured lymphocyte WIKIMEDIA COMMONS, CDC-C. GOLDSMITH

A long-term study that found a drastic reduction in HIV transmission rates when patients received early treatment with antiretroviral drugs rose to the top of Science's list of the year's best scientific breakthroughs. The study, published in an August issue of the New England Journal of Medicine, found that HIV-positive people are 96 percent less likely to transmit the virus to their heterosexual partners when they were treated with antiretroviral drugs early in the course of their infection.

Out of nearly 1,800 participating couples from across the world where one partner was HIV-positive and the other HIV-negative, 28 people became newly infected with the virus in the 4 years since the trial began. Only one of those new infections occurred in the group of couples in which the HIV-positive partner was treated...

Antiretroviral drugs are known to lower the viral load in the blood and in genital secretions, and researchers had suspected that treatment with the drugs prevented the spread of the disease. But this study is the first to confirm the effect in a large trial. The clinical trial was started in 2007 and was slated to run through 2015, but was stopped earlier this year when an independent monitoring board recommended that all of the study participants receive antiretroviral treatment immediately because their benefit was so markedly beneficial.

Interested in reading more?

Become a Member of

Receive full access to more than 35 years of archives, as well as TS Digest, digital editions of The Scientist, feature stories, and much more!
Already a member?