If it works, it may be distributed quickly and could blunt the epidemic. A vaccine continues to be the best hope but non-e is in sight. People like Matthew Bell, a 32-year-old hotel manager in San Francisco who volunteered for a safety study of one of the drugs. As much as I want to make the right choices all of the time, that’s not the truth of it, he said of practicing secure sex. If I thought there was a fallback parachute, a preventative, I would want to include that definitely.Desk 3Table 3Cumulative Risks of Adverse Health Outcomes in Women with and Those without Diethylstilbestrol Direct exposure and the Excess Risk Due to Exposure. Supplies the estimated cumulative risks of exposed and unexposed women in whom the study outcomes developed by 45 or 55 years, depending on outcome, combined with the excess risks . The excess risks among the exposed women ranged from 1.7 percent for a breast-cancer medical diagnosis at an age of 40 years or older to 35.4 percent for preterm delivery . DES-exposed females who also acquired vaginal epithelial adjustments had substantially higher cumulative and extra risks for some outcomes than DES-exposed females without these vaginal changes.