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The
AIDS Vaccine |
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The AIDS Vaccine
A vaccine is not exactly a novel invention, but one that's designed
to fight HIV certainly is. More than 20 years after the AIDS virus
was identified, researchers have devised the first immunization
to protect people against HIV infection. A six-year trial showed
that the vaccine, which consists of two shots that given individually
had failed to protect against HIV, is modestly effective, reducing
infection 31% among those receiving the regimen vs. those getting
a placebo. Scientists are still trying to figure out how the vaccine
decreases infection risk, since the shots did not affect the level
of virus in the blood of volunteers. And some experts question whether
the small effect is indeed significant. The vaccine is not approved
for use yet, but it's the first to make any headway against HIV,
and that's a start.
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