Tom Tapp Deputy Managing EditorOne day after Los Angeles County reported a record number of new coronavirus cases, Public Health Director Barbara Ferrer called new data “troubling and startling.”The director announced that the 7-day rolling average of the test positivity rate is up to 9.8 percent. That’s compared to 9 percent earlier this week.Ferrer said the county had seen 2,758 new cases of COVID-19 reported over the past 24 hours.