A HIV-positive British man has become the second known adult to be cured of the AIDS virus.
The man received stem cells from a donor with a rare genetic mutation that resists the HIV infection almost three years ago, and more than 18 months after coming off anti-retro-viral drugs, tests show the man no longer has the infection.
Doctors say this case is proof that one day scientists will be able to eradicate AIDS, but does not mean a cure for HIV has been found.