Coronavirus latest: one in five New Yorkers already infected, antibody test suggests.

More than one in five New Yorkers may have already had the new coronavirus, a testing sample showed on Thursday, suggesting infections are much higher than confirmed cases indicate.
Widespread testing – including for antibodies – is viewed as key to American states being able to lift stay-at-home orders and reopen their shuttered economies.
The presence of antibodies means a person has already been infected with the virus and might mean they are immune, meaning they could likely return to work without catching the illness again.
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