Zika virus RNA was detected in the blood of five pregnant women who had been exposed to the virus at least 2 weeks prior to PCR testing, case reports from the CDC's U.S. Zika Pregnancy Registry showed.
Read MoreZika virus RNA was detected in the blood of five pregnant women who had been exposed to the virus at least 2 weeks prior to PCR testing, case reports from the CDC's U.S. Zika Pregnancy Registry showed.
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