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Bad blood in Silicon Valley

The startup scandal that shook confidence in the tech investment scene

The story of Theranos, a company that falsely claimed it could perform a full range of medical tests using just a tiny blood sample drawn by pricking your finger. Manuela Saragosa speaks to John Carreyrou, an investigative reporter with the Wall Street Journal and author of a book on the case, Bad Blood. Plus Silicon Valley venture capitalist Hemant Taneja explains why investors need to be more cautious.

(Photo: Blood samples, Credit: Getty Images)

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