On Apr. 20, 2020, University of Southern California (USC) and the Los Angeles County Department of Public Health released preliminary results from a collaborative scientific study that suggests infections from the new coronavirus are far more widespread – and the fatality rate much lower – in L.A. County than previously thought.

Based on results of the first round of testing, the research team estimates that approximately 4.1% of the county’s adult population has antibody to the virus.