Stanford study estimates 53,000 more coronavirus cases in one California county

Stanford University researchers have moderated their controversial estimate of how many people in Santa Clara County were infected by the COVID-19 virus by early April — but stand by their conclusion that the illness was much more widespread than anyone knew.
In a revised analysis of a startling study published last month, they now estimate that 2.8% of Santa Clara residents were previously infected by the virus but didn’t know it.
That implies that the county had up to 54,000 infect