Got Coronavirus Antibodies?

One of the great uncertainties in the coronavirus pandemic is how many people have been infected without knowing it or showing symptoms. Fortunately, there are now tests for that, and broadly deploying them will be critical to saving lives and getting Americans back to work.

Dozens of commercial and public health labs around the world are rolling out antibody tests that can show if an individual was recently infected with the virus and has developed immunity. When fighting a pathogen, the immune system produces proteins known…

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