Zika may not be the only virus of its kind that can damage a fetus

Tests on pregnant mice show two other flaviviruses also cause deadly harm in the womb

West Nile virus

ALL IN THE FAMILY  West Nile virus (green) grows in a lab sample of human placental tissue in this micrograph. Like Zika, West Nile can harm a fetus, tests in mice show.

Nitin Arora and Carolyn Coyne/University of Pittsburgh

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