A panel of 12 jurors has been sworn in. Five alternate jurors were also chosen. The jurors were selected out of a pool of about 200.
Holmes faces federal charges for defrauding investors and patients with her now-defunct blood testing start-up. The fraud charges could result in up to 20 years in prison and a $3 million fine.
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Theranos created a blood test that required only a tiny sample from the finger and claimed to be able to diagnose a wide range of conditions.
Yesterday, Holmes walked into federal court in San Jose without answering questions -- including whether she believed she would get a fair trial given the high publicity surrounding her criminal trial.
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The jurors face a long trial that the judge has estimated could run for four months.
Hearings will be held only three days per week with the trial scheduled to begin on Sept. 8.