The AIDS epidemic has been in full swing for more than a decade now, but despite huge investments of research money and intellectual capital, medical science still has no effective weapon against the disease--and no definite idea of what such a weapon would even look like. Under these demoralizing conditions, any scrap of progress, no matter how tenuous, triggers an enormous surge of hope. It happened again last week with a report in the New England Journal of Medicine: doctors at UCLA announced that a five-year-old boy, infected with HIV at birth, has been symptom-free ever since. More important, over the...
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