London HIV Patient Becomes World’s Second AIDS Cure Hope

Joe Mendoza, AIDS Healthcare Foundation (AHF) mobile testing program manager, uses the photographer's finger to demonstrate how a lancet from the OraQuick Rapid HIV-1 Antibody Test kit would be used to obtain a blood sample inside the AHF mobile HIV screening lab on its first day of operations in Los Angeles, Calif. on Apr. 28, 2004. David McNew/Getty Images

An HIV-positive man in Britain has become the second known adult worldwide to be cleared of the AIDS virus after he received a bone marrow transplant from an HIV resistant donor, his doctors said.

Almost three years after receiving bone marrow stem cells from a donor with a rare genetic mutation that resists HIV infection—and more than 18 months after coming off antiretroviral drugs—highly sensitive tests still show no trace of the man’s previous HIV infection.