He refused to admit being HIV positive and denied meting with or having sex with the two men.
Scientists have, for years, been trying to find a way of clearing HIV reservoirs seeing it as the key to curing the disease.
These reservoirs of HIV-infected cells are found in the immune system, in places like the brain, bone marrow and genital tract.
"Unfortunately for some of the men he met, his campaign was successful.
"He had numerous, casual sexual relationships with men he met via Grindr.
After his first injection, the man's HIV infection load, which had been low, increased progressively up until day 45, then fell back again.