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VIRUS RISK FOUND FROM ANIMAL TRANSPLANTS

Scientists say they have found further reason to be concerned about transplanting organs from animals to people: two viruses that appear to infest a wide variety of pigs.

In February, British researchers announced that they had discovered an inherited virus in pig cells that could infect human cells in the test-tube.

In today's issue of the journal Nature, they report that two inherited viruses from pig cells can infect human cells in the test-tube, and that the genes for both viruses appear in a wide variety of pig breeds.

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