After adding more than 637,000 new cases in the past week, the United States now has more than 44.3 million confirmed cases of COVID-19. There have been more than 710,000 deaths linked to COVID-19 – the highest death toll of any country.
New cases continue to increase, albeit at a slower rate. Over the past week, there were an average of 28.1 new cases of coronavirus per day per 100,000 Americans – a decrease from the previous week, when there were an average of 33.4 new cases of coronavirus per day per 100,000 people.
As COVID-19 has spread to almost every part of the country, cities continue to be the scene of major epidemics. Experts agree that the virus is more likely to spread in groups where large numbers of people are in close contact with each other on a regular basis, such as colleges, nursing homes, bars and restaurants. Metropolitan areas with a high degree of connectivity between neighborhoods and a large population may be particularly at risk.
The San Francisco-Oakland-Berkeley, California metropolitan area consists of Alameda County, Contra Costa County, San Francisco County, and two other counties. Over the past week, there have been an average of 9.4 new cases of coronavirus per day per 100,000 San Francisco residents, lower than the national figure. The metro area’s average daily growth in cases in the most recent week is essentially unchanged from the previous week, when there was an average of 10.7 new daily cases per 100,000 San Francisco residents.
The spread of the coronavirus depends on various factors and can vary even between neighboring counties. In the San Francisco-Oakland-Berkeley metropolitan area, COVID-19 is growing fastest in Contra Costa County. There have been an average of 12.0 new cases per day per 100,000 population in Contra Costa County over the past week, most of San Francisco’s five counties for which data is available.
The growth of cases in the San Francisco metro area varies at the county level. In Marin County, for example, there have been an average of 7.3 new cases per day per 100,000 population over the past week – the least of all San Francisco counties and more than the growth rate of case in Contra Costa County.
Just as Contra Costa County is driving the growth of COVID-19 in the San Francisco area, it also has the highest incidence of cases overall. As of October 14, there were a total of 8,660.4 confirmed cases per 100,000 population in Contra Costa County, most of the five counties in the metropolitan area. By comparison, the United States has so far reported 13,646.9 cases per 100,000 Americans nationwide.