Zika birth defects

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ROBERT SIEGEL, HOST:

Health officials have published the first comprehensive view of Zika-linked birth defects occurring in the U.S.

The study is the largest so far to estimate the risk of severe birth defects from Zika infections in pregnant women, researchers report Wednesday in the Morbidity and Mortality Weekly Report,

One big question about the Zika virus has been how big a risk the virus might pose in the United States.

Studies earlier this year suggested that birth defects and other problems were mainly limited to babies born in some parts of Brazil.

A study out Tuesday provides a sense of the effects on women who were exposed while pregnant in other countries and then came to the United States. About 6 percent of those pregnancies resulted in defects in the fetus or baby.