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Jokes aside, my understanding is that diagnosing diseases using a drop of blood was once a promising and legitimate application of microfluidic & lab-on-a-chip technology and many believed it was the future. The problem of Theranos was that the company was being completely delusional about its serious limitations, and now everything that involves "a drop of blood" has a bad name afterwards.

Is there anyone who work in the related area of research? Could you give us an overview of the actual progress of the technology today? What can the technology do today? And what is the limitations?