Aggressive social distancing policies in the Bay Area have slowed the spread of COVID-19 in that region compared with the rest of California

Chart: Center for American Progress Source: Erin Allday, "The numbers behind the coronavirus pandemic demand an urgent response," San Francisco Chronicle, March 22, 2020, available at https://www.sfchronicle.com/health/article/The-numbers-behind-the-coronavirus-pandemic-15148507.php.