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What are the issues and the risks of human-to-human West Nile Virus transmission (e.g, via organ transplant, blood transfusions, or from mother to baby)?

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What are the issues and the risks of human-to-human West Nile Virus transmission (e.g, via organ transplant, blood transfusions, or from mother to baby)?

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(revised Dec 23, 2002) Health officials have become convinced that WNV can be transmitted via organ transplant and blood transfusion, as well as from mother to fetus and possibly to babies in breast milk. As of Labor Day Weekend 2002 there was a growing body of evidence that WN virus can be transmitted via organ transplant from an infected person (and an associated risk that it might also be transmitted by blood transfusion). By end of the first week in September, during a Sept 5 telebriefing, and then in the Sept 6 MMWR, CDC confirmed with a high level of certainty that organs from an infected donor had transmitted the infection to 4 organ recipients. Research to determine if WNV can also be transmitted via blood transfusion was prompted by trying to understand how the organ donor had become infected, since blood tests before she received blood transfusions did not show she was WNV-positive, while later tests did. Interest was spurred when it was learned that at least 4 other people h

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