The U.S. government plans to fund new tests on a medicated ring for women to protect themselves from the AIDS virus, NBC News reports.
In previous studies, the ring lowered HIV risk by 27 percent, and in women 25 and older, the risk was decreased by a staggering 61 percent.
The new question for the National Institute of Allergy and Infectious Diseases, which is funding the tests, is why older women had better results.
U.S. & World
Dr. Anthony Fauci, the director of the NIAID, believes younger women involved in the early study did not use the ring correctly, which may have altered results.
"If it had no efficacy in any age group, then you would say it was hopeless," Fauci said. "It is very clear that this can work under certain circumstances."