L.A. County and USC are teaming up to test a demographically-representative group of 1,000 people for antibodies to COVID-19. Testing for antibodies is the best way to determine how far the virus has spread and how deadly it is.

<p>L.A. County and USC are teaming up to test a demographically-representative group of 1,000 people for antibodies to COVID-19. Testing for antibodies is the best way to determine how far the virus has spread and how deadly it is.</p>

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