Table 3.
Seroprevalence of anti-SARS-CoV-2 IgG per region: combined results obtained with OMEGA/IDVet and Wantai ELISA
| Region | All samples (n) | Seropositive samples (n) | Crude seroprevalence |
Adjusted seroprevalence |
Population per region | Estimated COVID-19 infection | Confirmed COVID-19 cases | Ratio of reported cases to estimated infection | ||
|---|---|---|---|---|---|---|---|---|---|---|
| % | (95% CI) | % | (95% CI) | |||||||
| Dakar | 295 | 128 | 43.4 | 37.7–49.3 | 44.0 | 38.3–49.9 | 3 835 011 | 1 687 405 | 11 016 | 1:153 |
| Diourbel | 117 | 22 | 18.8 | 12.2–27.1 | 19.0 | 12.2–27.1 | 1 859 503 | 353 306 | 754 | 1:469 |
| Fatick | 75 | 13 | 17.3 | 9.6–27.8 | 17.5 | 9.6–27.8 | 900 800 | 157 640 | 325 | 1:485 |
| Kaffrine | 79 | 21 | 26.6 | 17.3–37.7 | 26.9 | 17.3–37.7 | 728 951 | 196 088 | 20 | 1:9804 |
| Kaolack | 113 | 37 | 32.7 | 24.2–42.2 | 33.1 | 24.2–42.2 | 1 191 577 | 394 412 | 291 | 1:1355 |
| Kedougou | 21 | 4 | 19.0 | 5.4–41.9 | 19.2 | 05.4–41.9 | 190 509 | 36 578 | 219 | 1:167 |
| Kolda | 52 | 12 | 23.1 | 12.5–36.8 | 23.4 | 12.5–36.8 | 822 003 | 192 349 | 216 | 1:891 |
| Louga | 118 | 13 | 11.0 | 6–18.1 | 11.1 | 6–18.1 | 1 061 612 | 117 839 | 75 | 1:1571 |
| Matam | 45 | 5 | 11.1 | 3.7–24.1 | 11.2 | 3.7–24.1 | 732 863 | 82 081 | 51 | 1:1609 |
| Saint-Louis | 94 | 15 | 16.0 | 9.2–25 | 16.2 | 9.2–25 | 1 091 735 | 176 861 | 319 | 1:554 |
| Sédhiou | 57 | 27 | 47.4 | 34–61 | 48.0 | 34–61 | 572 101 | 274 608 | 151 | 1:1819 |
| Tambacounda | 106 | 25 | 23.6 | 15.9–32.8 | 23.9 | 15.9–32.8 | 872 155 | 208 445 | 111 | 1:1878 |
| Thiès | 200 | 48 | 24.0 | 18.3–30.5 | 24.3 | 18.7–31.1 | 2 162 833 | 525 568 | 1974 | 1:266 |
| Ziguinchor | 50 | 28 | 56.0 | 41.3–70 | 56.7 | 41.3–70 | 683 955 | 387 802 | 567 | 1:684 |
| National | 1422 | 398 | 27.9 | 25.7– 30.4 | 28.4 | 26.1–30.8 | 16 705 608 | 4 744 393 | 16 089 | 1:295 |
CI, confidence interval.