https://www.mercurynews.com/2020/03/13/coronavirus-where-is-it-spreading-around-the-bay-area/

The Bay Area had some of the country’s first cases of the potentially deadly new coronavirus, and as infections reached pandemic levels around the world this week, more and more people locally are testing positive for the disease — with no signs of abating.

There are nearly 200 reported cases in the region. But why are some counties seeing spikes while others are not?