Dr. J. Victor Garcia-Martinez, UT Southwestern Medical Center (image) UT Southwestern Medical Center Share Print E-Mail Caption Dr. J. Victor Garcia-Martinez led research showing that anti-retroviral drugs given daily before and after exposure to HIV can prevent vaginal transmission of the virus that causes AIDS. Worldwide, the vast majority of newly acquired HIV infections occur through unprotected vaginal sex with an infected partner. Credit UT Southwestern Medical Center Usage Restrictions UT Southwestern Medical Center Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.