Not exactly accurate either: But in a 4,400-volunteer study in South Africa, the vaccine proved only 49% effective. In the 94% of the study population that did not have HIV, the efficacy was 60%.but less than 50% effective against the South African strain first reported in December. The first two cases of the S. African strain have been reported in the U.S. in S. Carolina. I don’t think we’re out of the woods by any measure.