As of March 4, there have been 10,275 St. Clair County residents in their 30s who have tested positive for COVID-19, according to numbers being reported to the Illinois Department of Public Health.
There have been 132,742 residents in their 30s in the county who had been tested, meaning that 7.7 percent of those tested have the coronavirus. Through March 4, there have been 63,171 confirmed COVID-19 cases and 718 deaths from the coronavirus in St. Clair County.
Illinois was home to some of the first reported COVID-19 cases in the US. It has suffered numerous waves of the pandemic, which peaked in the fall of 2020. As the Midwestern hub of the US, Illinois businesses suffered greatly, including layoffs at two major airlines based in the state.
| Date | Total Tested | Total Positive | Positive % |
|---|---|---|---|
| March 4 | 826,516 | 63,171 | 7.6 |
| March 3 | 825,307 | 63,151 | 7.7 |
| March 2 | 823,578 | 63,123 | 7.7 |
| March 1 | 822,524 | 63,088 | 7.7 |
| February 28 | 821,133 | 63,050 | 7.7 |
| February 25 | 818,015 | 62,994 | 7.7 |
| February 24 | 816,362 | 62,953 | 7.7 |
| February 23 | 814,995 | 62,910 | 7.7 |



