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Dr. Anthony Fauci, director of NIAID and a longtime advocate for a vaccine that is at least 50 percent effective, said he feels “even more strongly now” that a partially effective vaccine would be worth deploying. He said that is because prevention strategies like pre-exposure prophylaxis (PrEP) and treatment as prevention (TasP) “are being so successfully used, even in the absence of a vaccine, that if one or more of these vaccines look good, have a 50-60 percent efficacy, I think that’s going to be the game changer for turning the epidemic around.”

HVTN 702 completed enrollment this summer, and clinical results are expected in late 2020 or early 2021.

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