Quest Diagnostics

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FILE - In this Thursday, Feb. 4, 2016, file photo, a medical researcher uses a monitor that shows the results of blood tests for various diseases, including Zika, at the Gorgas Memorial laboratory in Panama City. On Thursday, April 28, 2016, the U.S. Food and Drug Administration authorized Quest Diagnostics to offer the first commercial test for the Zika virus in the United States. Previously, Zika tests were only available through a handful of government-designated laboratories. Quest said the commercial test could be available as early as the first week of May. (AP Photo/Arnulfo Franco, File)