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I don't think bone marrow transplants are quite that cut & paste.

Someone should file a bug report, cos that is obviously a design flaw.

Cut and paste will be in the next release :-)

Of course, but with a bit of research it might be a better long term alternative; suppressing the immune system isn't something that'll ensure longevity.

Your chance of survival would go from (0.9) to (0.9*0.9).

Also, this paper hasn't actually proven a cure. It has clearly demonstrated long-term suppression. However, by replacing the CCR5-deficient T cells with his regular cells, you'd certainly test the hypothesis. There is also the risk that you would be reintroducing HIV-infected cells.

Isn't there the issue that his original bone marrow (which you've temporarily removed) is probably infected with HIV? Returning it at a later date would reinfect him.