Former Theranos lab worker details concerns about company's ability to conduct blood tests

In her testimony, Cheung detailed her growing concerns about the company’s devices failing quality control tests in the research lab as well as what she said was a manipulation of data to pass quality control. This made her question the capabilities of the startup’s proprietary testing machine, which she said was only being used on a small number of tests at the time it was hailed as the company’s revolutionary innovation.At times, she said, Theranos employees would delete up to two out of six data points as part of a test in order to pass quality control. She said there appeared no standard protocol within Theranos for when outlier

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