[Flammy]

My understanding is they took much smaller samples of blood which lead to lots of reproducibility problems. The standard machines they were using were being fed with up-sampled blood because Theranos didn't have the normal sample size.

> People were getting good results because Theranos was using machines from Siemens in their hidden lab.

Thus the tests sometimes were good, and sometimes bad. Some patients underwent unnecessary medical treatments and procedures based on bad tests.