Researchers Remain Optimistic on AIDS Vaccine

Listen: All Things Considered audio

The first AIDS vaccine to undergo large-scale human trials is not deemed a success. But officials with the company testing the vaccine see hope in the results, which varied between ethnic minority groups. Hear NPR's Richard Harris, NPR's Robert Siegel and Dr. David Baltimore, former chairman of the AIDS Vaccine Research Committee at NIH, now president of the California Institute of Technology.

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