The discovery of a virus which may cause Aids, the fatal disease sweeping through America, has been hailed as a "monumental breakthrough" in medical research.
The development was announced in Washington by US Health Secretary Margaret Heckler.
She said the virus was a variant of a known human cancer virus called HTLV-3. A blood test has also been developed, which, she said, would be available within six months, preventing the tragedy of transfusion patients contracting the disease through tainted blood products.
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