The patient, a U.S. citizen living in Germany, was suffering from advanced leukemia and HIV two years ago when Huetter treated the cancer with a bone-marrow transplant at Berlin's Charité hospital. As a side experiment, he inserted the bone marrow of a donor naturally resistant to HIV, the virus that causes AIDS. (Researchers have long known that about 1% of Europeans carry a genetic mutation that makes their cells resistant to HIV infection.) Bone marrow produces the cells that HIV attacks. So, the thinking went, inserting marrow that produces HIV-resistant cells might endow the patient with a means to repel the infection. Twenty months after the transplant, Huetter says, the man shows no signs of carrying the virus. .......... @ltaLINK clipped from www.time.com The human immunodeficiency virus (HIV) is a pathogen so wily and protean that researchers rarely talk about curing infected patients, focusing instead on treatment and prevention. But in an announcement that caused a flut...