As breakthroughs go, finding a cure for AIDS would be pretty high on the list, and that’s what Berlin doctors believe they have achieved. US citizen Timothy Ray Brown was treated for acute myeloid leukaemia in 2007, with doctors carrying out a stem cell transplant using bone marrow resistant to HIV infection. That marrow lacked the CCR5 co-receptor on CD4 cells – to which the most common form of HIV initially binds with – and by replacing all of the patient’s infected CD4 cells, the HIV has seemingly been eradicated.
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