1 having become dominant, the LA County Department of Public Health reported an average of 621 cases each day, marking a 25% increase from the previous week. Credit: Carolyn Cole/Los Angeles Times/PolarisĪs students return to school after holiday travel and festivities, respiratory illnesses are at high levels in Los Angeles, with many suffering from a mix of Covid and the flu.ĭuring the week leading up to Dec. Third graders at Hooper Avenue School in Los Angeles wear their mask during class.