科学家们称一种实验疫苗可以降低31%左右的艾滋病感染风险，并且安全无害。
Hints:
AIDS
H.I.V.
Thailand
placebo
Thai Ministry of Public Health

Supachai Rerks-Ngarm
AIDS researchers say they still have much work to do on a vaccine against H.I.V. But the first reports of some success have raised hopes. Scientists say an experimental vaccine reduced the risk of infection in humans by 31% and was safe. The study was designed to test for 2 abilities. One was th…
艾滋病研究者们称想要制成艾滋病疫苗的话还需要付出很大努力，但是一些关于所取得成绩的最新报告已经让人们看到了希望的曙光。科学家们称一种实验疫苗可以让人们降低31%左右的感染风险，并且安全无害。 研究的目的是测试两种能力。一是防止受到艾滋病毒感染的能力，另外一种能力则是要降低在研究过程中被感染者的血液中的…