But, while the use of tenofovir has been shown to substantially reduce the transmission of HIV when used before exposure — it is by no means 100% effective. And, since researchers are saying the tenofovir-release ring has similar success rate to that of the gel, a condom would definitely still be necessary to more completely protect against the disease.
That being said, there are millions of people who are HIV-positive in the world, and there are millions more unintended pregnancies. Often, these occur in some of the poorest countries in the world — places where medical care is sparse or unaffordable. A simple, affordable option that can help to protect women for disease and pregnancy could be a HUGE deal, both here and abroad.
Phase I clinical trials are set to being early in 2014. (Eureka Alert)