The novelty of this (not captured in the headline) is that the man received non-resistant stem cells .

I believe in all previous cases the donors had mutations of the CCR5 gene which made them resistant to HIV.

Second sentence from the article:

> Significantly, he is also the second of the seven who received stem cells that were not actually resistant to the virus, strengthening the case that HIV-resistant cells may not be necessary for an HIV cure.