"Steady progress" - just to make someone not familiar with the pharma industry gets this correctly : this means only the safety part of the drug has been proven, but there is no efficacy proof so far, so technically speaking we are very far away from a commercial vaccine. Probably 5-7 years more work ahead, assuming nothing goes wrong. And efficacy may not be a binary scenario, depending on the virus strains, since HIV is known to mutate a lot. Don't hold your breath, even if this is encouraging.