In 2007, an HIV-infected adult patient living in Berlin developed acute myelogenous leukemia and was treated with a transplant from an allogeneic hematopoietic stem cell donor who was homozygous for the CCR5-Δ32 deletion and, after stopping antiretroviral therapy following transplantation, his viral load remained undetectable, becoming the first confirmed case of cure of HIV infection [100]. The gene discussed is CCR5; the disease is HIV infectious disease.