https://www.mercurynews.com/2020/04/07/coronavirus-in-alameda-county-dozens-of-nursing-home-staff-and-residents-test-positive-for-covid-19/

In what appears to be the largest Alameda County coronavirus outbreak, a skilled nursing facility in Hayward could have more than 40 cases of COVID-19, while another facility in Castro Valley has almost two dozen confirmed cases across staff and residents.

The Hayward facility, called Gateway Care and Rehabilitation Center, has 21 positive cases among its 49 residents, said administrator Andre Aldridge. He was not immediately clear on how many staff members have tested positive, but said it was about 20, or more.