Table 3.
Number of asymptomatic COVID-19 infections per million population not detected under varied prevalence of asymptomatic infection and testing levels
| Prevalence of asymptomatic COVID-19 infection | Number of tests conducted | Upper 95% confidence limit of prevalence estimate for COVID-19 in asymptomatic population | Number of cases in screened population | Number of COVID-19 asymptomatic infections missed by screening | % of asymptomatic COVID-19 infections in populations that are missed during screening |
|---|---|---|---|---|---|
| 0.79% | 10,000 | 0.98% | 7900 | 7821 | 99.0% |
| 0.48% | 10,000 | 0.64% | 4800 | 4752 | 99.0% |
| 0.24% | 10,000 | 0.36% | 2400 | 2376 | 99.0% |
| 0.16% | 10,000 | 0.26% | 1600 | 1584 | 99.0% |
| 0.10% | 10,000 | 0.18% | 1000 | 990 | 99.0% |
| 0.79% | 15,000 | 0.95% | 7900 | 7782 | 98.5% |
| 0.48% | 15,000 | 0.60% | 4800 | 4728 | 98.5% |
| 0.24% | 15,000 | 0.33% | 2400 | 2364 | 98.5% |
| 0.16% | 15,000 | 0.24% | 1600 | 1576 | 98.5% |
| 0.10% | 15,000 | 0.16% | 1000 | 985 | 98.5% |
| 0.79% | 20,000 | 0.92% | 7900 | 7742 | 98.0% |
| 0.48% | 20,000 | 0.59% | 4800 | 4704 | 98.0% |
| 0.24% | 20,000 | 0.32% | 2400 | 2352 | 98.0% |
| 0.16% | 20,000 | 0.23% | 1600 | 1568 | 98.0% |
| 0.10% | 20,000 | 0.15% | 1000 | 980 | 98.0% |
| 0.79% | 25,000 | 0.91% | 7900 | 7703 | 97.5% |
| 0.48% | 25,000 | 0.57% | 4800 | 4680 | 97.5% |
| 0.24% | 25,000 | 0.31% | 2400 | 2340 | 97.5% |
| 0.16% | 25,000 | 0.22% | 1600 | 1560 | 97.5% |
| 0.10% | 25,000 | 0.15% | 1000 | 975 | 97.5% |