Today’s report on COVID-19 in King County | Mon May 4

Today, Public health announced that the number of COVID-19 infections in King County has been on the decline since the end of March, according to two recent reports, which suggest increased confidence that physical distancing measures are leading to a decline in active infections.

Otherwise, this daily synthesis of the Public Health data is provided by Will Daugherty of Pacific Science Center.  Thanks Will!

Public Health has updated the data dashboard.  As of 11:59 pm yesterday, May 3, there were 6,574 confirmed cases of COVID-19 in King County, 110 more than the previous day.  There have been 461 confirmed deaths in King County due to COVID-19, 7.0% of all confirmed cases.

The numbers that Public Health reports each day include delayed results from previous days.


The three graphs below chart new cases, total case count and the logarithmic trajectory of cases.

The first graph shows new cases (blue bars) and the 7-day average (red line).  Of the 110 new cases reported today, 82 were confirmed yesterday and the remaining 28 were confirmed in previous days but reported to Public Health in the last day, resulting in restatements of the totals for previous days.  The 7-day average peaked at 189 on April 1 and has declined to 77, the same level as on March 19.

The second graph shows the total case count.  With 6,574 total cases as of 11:59 pm yesterday, the compound daily growth rate during the last 7 days has been 1.2%, slightly less than the 1.6% rate during the prior 7 days.  If we start with 6,574 cases, a 1.2% compound daily growth rate (1.234% to be precise) yields 81 new cases in a day, 590 new cases in a week, and 2,675 new cases in four weeks.

Will Daugherty welcomes your questions and comments.  His email is