Most women use vaginal ring for HIV prevention in open-label study

(NIH/National Institute of Allergy and Infectious Diseases) In an open-label study of women in southern and eastern Africa, a vaginal ring that is inserted once a month and slowly releases an antiviral drug was estimated to reduce the risk of HIV by 39%, according to statistical modeling. In addition, the study found that participants appeared to use the ring more in the open-label study than in a previous clinical trial.