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      Scientific American July 1999

      DEATH OF A VACCINE?

      People with weakened HIV are getting sick, quelling enthusiasm for a live AIDS vaccine

      • By Carol Ezzell on July 1, 1999

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      More in the July 1999 issue of Scientific American
      • The Hidden Cosmic Ruckus
      • LOTS IN SPACE
      • Replacing the Battery in Portable Electronics
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