There are currently 31 people in the U.S. who have been diagnosed with the Zika virus, including three pregnant women -- two in Illinois and one in New York.<br />Those infected are spread across 11 states and Washington, D.C., according to the U.S. Centers for Disease Control and Prevention.<br />All of those infected contracted the virus outside of the U.S. before returning, according to health officials.<br />Another woman in Hawaii is believed to have had the Zika virus after her infant was born with the associated birth defect called microcephaly -- characterized by an abnormally small head and brain, which can lead to developmental delays.<br />The birth defect has been associated with the virus in Brazil, where more than 4,000 children have been diagnosed with the condition.
