Coronavirus infections could be much more widespread than believed, California study suggests
LA TimesHealthcare workers take a sample from a driver at a coronavirus testing site at the Westminster Mall last week. The preliminary study, conducted by researchers at Stanford University, estimates that between 2.5% and 4.2% of Santa Clara County residents had antibodies to the new coronavirus in their blood by early April. Investigators from the Los Angeles County Department of Public Health and USC launched a similar study a week after Santa Clara began its effort. Barbara Ferrer, the county’s top public health official, said that although the Los Angeles study will have somewhat different numbers, “they’re going to tell a similar story. One key takeaway of the Santa Clara County study is that a large number of people who are infected with the coronavirus never show any symptoms, said Karin Michels, chair of the epidemiology department at UCLA’s Fielding School of Public Health.