An HIV-positive person who takes anti-retroviral drugs after diagnosis, rather than when their health declines, can cut the risk of spreading the virus to uninfected partners by 96%, according to a study.
"This breakthrough is a serious game changer and will drive the prevention revolution forward. It makes HIV treatment a new priority prevention option," said Michel Sidibe, executive director of the Joint United Nations Programme on HIV/Aids (UNAIDS).
But he warned that it would cost more than ten billion dollars to provide drugs to the ten million people worldwide who are currently not receiving medication for HIV.
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