原文：HIV researchers have made the biggest breakthrough in 15 years, identifying two powerful antibodies that appear to fight all types of the virus - a development that brings new hope of a vaccine. The knowledge could lead to gene therapies to treat people already infected with HIV, as well as vaccines to protect people from infection.

翻譯：愛滋病病毒（HIV）研究人員已經取得15年來最重大的突破。他們發現兩種強力抗體，似乎可以對抗各種型式的HIV，而這項發現為疫苗的研發帶來新的希望。它可能讓研究人員發展出預防感染HIV的疫苗，也可能為基因療法開路，幫助已經感染這個病毒的人。