https://www.mercurynews.com/2020/04/21/coronavirus-deaths-in-california-slow-as-total-cases-near-34000/

There was a spike in California’s coronavirus cases Monday, but a backlog of tests at one lab in Los Angeles was responsible for most of the increase.

California added more than 2,300 positives to its count Monday, the most new cases in a day since the onset of the outbreak, but nearly 1,200 were from a week’s worth of tests at a single laboratory.