How far has coronavirus spread? This test is a first step in trying to get back to normal life

It has been one of the most glaring unanswered questions of the coronavirus crisis: How much has the virus spread? A new study in Los Angeles County might help provide some answers. Starting Friday, county health officials will begin testing the blood of 1,000 randomly selected residents, including those with no symptoms, to see if they have or had COVID-19. Using emerging technology that tests for antibodies to a virus, the study has the potential to shed light on the true mortality rate of the coronavirus, the efficacy of social distancing efforts and when this unprecedented clampdown on daily life could end. Los Angeles Times

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