The need for diagnostic testing has been a critical issue throughout the spread of the coronavirus epidemic. But another form of testing may be the key to gaining control over the pandemic. Surveillance testing currently being performed throughout the world is what is used to gather the data that tells health officials where, who, and how populations are being affected and that can then be used to get in front of further spread. We’ll talk to epidemiologist, Emily Martin about how it works and who’s doing it right.

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