研究人员报告说，在抗击艾滋病方面可能取得突破。研究发现，一种女用阴道凝胶可以大幅度降低她们从一个携带艾滋病病毒的伴侣那里感染艾滋病的机率。
对这种凝胶的临床试验结果将于星期二晚些时候在维也纳的第18届国际艾滋病大会上正式公布。
来自南非的科学家说，使用这种含有泰诺福韦的凝胶一年后的妇女感染艾滋病的机率比使用安慰剂凝胶低50%。而使用两年半以后，感染率则可降低39%。
联合国艾滋病规划署执行主任西迪贝说，新的阴道凝胶将对妇女预防感染艾滋病病毒产生革命性的影响。
这是研究人员第一次研究出有效的杀菌剂，即在性交前放入体内的一种物质以防止艾滋病毒的传播。
不过专家提醒说，在将这个杀菌剂推广到公众使用之前还必须对它的安全性和有效性进行更多的审查。
Researchers are reporting a possible breakthrough in the fight against AIDS, with the unveiling of a vaginal gel that has sharply reduced the chances of women getting HIV from an infected partner.
The results of clinical trials on the gel are to be formally released at the 18th International AIDS Conference in Vienna later Tuesday.
Scientists from South Africa say that women using the gel, which contained the drug tenofovir, had a 50 percent lower infection rate after one year compared to women given a placebo gel. The infection rate was 39 percent lower after two and a half years.
UN-AIDS chief Michel Sidibe says the new vaginal gel is going to revolutionize HIV prevention for women.
This is the first time researchers have made a successful microbicide -- a substance inserted into the body before sex to prevent transmission of the HIV virus.
However, experts caution that further scrutiny is needed of the microbicide's safety and effectiveness before it can be released to the public.
