Theranos hit by another setback as it withdraws request for Zika test approval

Troubled diagnostic company Theranos suffered another blow as it withdrew its request for federal approval of a new Zika virus blood test, The Wall Street Journal reports. The Food and Drug Administration is said to have turned up evidence that Theranos began testing the diagnostic without the necessary protections for human subjects of research.

The withdrawal is just the latest in a string of setbacks

Over the past year, scandal has dogged the start-up that was once valued at $9 billion. In May, the company threw out tens of thousands of results from its Edison blood-testing machine and issued corrected lab test reports to patients. But in an attempt to get back on its feet, the company unveiled its latest miniaturized diagnostic...