Where are the Rapid Tests?

We usually have to wait days to get the results from our nose-swab PCR tests, and meanwhile, we might be spreading the virus without even knowing it. What if instead we could all be tested twice a week and know the results in just minutes? CNN Chief Medical Correspondent Dr. Sanjay Gupta speaks with Harvard epidemiologist Dr. Michael Mina about the game-changing potential of affordable at-home rapid testing. 

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