Until now, four broadly neutralizing antibodies had been isolated from HIV-positive patients in the Americas, Europe and Australia. But scientists have struggled to design a vaccine around them.

• 到目前为止，已经从美洲、欧洲和澳大利亚的HIV阳性患者体内分离出了四种具有广泛中和性的抗体。不过科学家们仍努力在抗体的基础上设计出疫苗。