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A new blood test may extend the window of accurate detection from weeks to months after the onset of Zika infection, giving clinicians a powerful new tool to screen for Zika throughout pregnancy, a new study led by an Indian-orgin researcher suggests. Infection with Zika virus during pregnancy raises risk for neurodevelopmental problems in the offspring, including fetal microcephaly -- a condition in which a baby's head is significantly smaller than expected -- in at least one in ten pregnancies.