After several weeks in the mid 200 range, COVID-19 figures for Fairfax County swelled to over 400 new cases per week in mid-August.
While the data at the time showed cases continuing to trend downward, the window of COVID-19 diagnoses meant that the figures for the mid-August timeframe increased substantially in the following weeks. The week of Aug. 16 there were 434 new cases — the highest number of new cases per week since May.
While higher than the average, the number of new cases was still higher than the peak of 1,400 new cases the week of April 26. The weeks after August showed a substantial decline as well, to just 99 cases for the week of Aug. 30, the change to earlier weeks showed those figures could increase with time.
One of the highest densities of cases was the 22027 area code, which includes Dunn Loring and parts of Idlywood, but the zip code is small enough with a population of only 2,362 that a count of 71 confirmed cases was disproportionately high.
The other areas nearby had roughly 200 confirmed confirmed cases each except 22043, which includes Merrifield and parts of Tysons, which had 353 cases.