Earlier this month, Connecticut resident Jay Black and his lawyer used an unprecedented defence in a paternity suit filed by the mother of a three-year-old child. Although two DNA tests identified Black as the father, he claims infection with human papilloma virus could have altered his DNA, skewing the test results. Gordon Carmichael, a microbiologist at the University of Connecticut Health Center in Farmington, agreed to testify that the virus would damage the DNA of cells it infected, and that genetic tests on these cells could be unreliable.
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