https://www.mercurynews.com/2020/04/04/analysis-where-is-the-covid-19-pandemic-hitting-hardest-in-the-bay-area/

As the coronavirus pandemic continues to ravage our communities, no Bay Area county is immune from the hardship and trauma caused by COVID-19.

All 10 Bay Area counties have reported at least one COVID-19-related death and more than 3,000 people have tested positive for the coronavirus in the region. As hospitals prepare for a surge in patients the governor and state health officials increasingly see as inevitable, local health officials from the six most populous Bay Area counties issued guidance Thursday recommending people who must leave their homes for essential travel wear face coverings.