Technology companies are going all in on the practice of contact tracing. But will our personal data be deleted once the pandemic is over? And does the tech even work? In this part of CNN's Inventing Tomorrow: Tech in a time of Pandemic, we walk through the latest geo-fencing and tracing apps across Asia, and talk to cybersecurity expert Susan Landau of Tufts University who says: “It’s a very dangerous technology in the wrong hands.”
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