The cities of Atlanta and Sandy Springs together saw 569 new COVID-19 diagnoses between Dec. 1 and Dec. 4 update reports from the Fulton County Board of Health.

The number of cases increased in all of the main local ZIP codes. The 14-day trend rose in both cities and in all but one of the ZIP codes.

A chart of COVID-19 diagnoses by city in Fulton County as shown in a Dec. 4 Board of Health report.

As of Dec. 4, the part of Atlanta within Fulton County had 16,973 COVID-19 diagnoses, up from 16,533 on Dec. 1. Sandy Springs had 3,729 diagnoses, up from 3,600.

Atlanta remained the number one city in the county for COVID-19 diagnoses at 43.9% of the total, and Sandy Springs remained third with 9.7% of the total.

The 14-day trend in new COVID-19 in each city is charted in the report, calculated by comparing the 14 days preceding the previous seven days with the 14-day period before that. In Atlanta, the 14-day trend was up by 26.7% and in Sandy Springs the 14-day trend was up 26%.

To view the full report, see the county website here.

The report does not state whether the numbers reflect the coronavirus’s spread, the state of testing, or both.

The statistics, which are based on patients’ home addresses, are not completely accurate due to such factors as a large number of patients whose cities or ZIP codes are unknown. Of those diagnosed, their ZIP code was unknown in 742 cases and their home city was unknown in 2,283 cases. All numbers are preliminary and may be adjusted later, including through “data cleaning” — the reassignment of some cases to a different ZIP code or city after further analysis.

The total number of confirmed COVID-19 diagnoses in the county as of Dec. 1 was 38,624. The countywide confirmed death total from the pandemic was 675. A total of 97 fatalities were being reviewed by the Georgia Department of Public Health to confirm the cause of death.

The number of total diagnosed cases and the 14-day trend in the main ZIP codes in Buckhead and Sandy Springs between the Dec. 1 and Dec. 4 reports were as follows.

Buckhead ZIP codes

30305: 1,192 (up from 1,152), up 38%

30326: 401 (up from 388), up 28.6%

Sandy Springs ZIP codes

30328: 1,282 (up from 1,233), up 10.3%

30350: 972 (up from 934), up 50%

Buckhead and Sandy Springs combined ZIP codes

30327: 879 (up from 855), down 2.3%

30342: 1,607 (up from 1,561), up 49.4%

John Ruch is an Atlanta-based journalist. Previously, he was Managing Editor of Reporter Newspapers.