Dr Williams and his supporters believe that if enough infected people are treated, it would lower the rate of infection to such an extent that the epidemic would die out within the lifetime of those undergoing the treatment. Aids could effectively be wiped out by the middle of this century, he said.
"The problem is that we are using the drugs to save lives, but we are not using them to stop transmission," Dr Williams said. Blocking transmission can only be done with an extensive testing regime followed by rapid treatment with anti-retroviral drugs to everyone found to be HIV positive, he said.
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