Stopping the Zika virus

The World Health Organization is meeting in emergency session today to consider the international response to the Zika virus that has affected thousands of pregnant women and infants across Latin America. The virus, which is spread by mosquitoes, has been linked to a recent rise in serious birth defects in Brazil and other countries across the region, and WHO is warning it could soon reach the U.S. Finding a way to stop the explosive spread of this dangerous pathogen clearly needs to be a top priority for U.S. public health officials this year.

At this point, medical researchers have developed neither a vaccine to protect against infection by the virus nor a reliable test to...