Merck's Experimental HIV Vaccine Fails

In a disappointing setback, a promising experimental AIDS vaccine failed to work in a large international test, leading the developer to halt the study. Merck & Co. said Friday that it is ending enrollment and vaccination of volunteers in the study, which was partly funded by the National Institutes of Health. It was a high-profile failure in the daunting quest to develop a vaccine to prevent AIDS. Merck's vaccine was the farthest along and was closely watched by experts in the field. Read more in this article from the Associated Press

Related Information

• Barriers to HIV Vaccine Development

• HIV Vaccines - Our Biggest Challenge

• Understanding Clinical Trials