Table 5 SARS-CoV-2 seroprevalence by dwelling and secondary attack rate
Dwellings | Dwellings with seropositive residents | Residentsa | Seropositive residents | 2nd attack ratec | |||
|---|---|---|---|---|---|---|---|
n | % (95%CI) | n | n | Attack rate%b (95% CI) | % (95% CI) | ||
Coquimbo-La Serena | 219 | 16 | 7.3% (4.2–11.5) | 46 | 30 | 65.2% (49.8–78.6) | 46.7% (28.3–65.7) |
Santiago | 675 | 123 | 18.2% (15.4–21.3) | 317 | 200 | 63.1% (57.5–68.4) | 39.7% (32.7- 46.9) |
Talca | 261 | 9 | 3.5% (1.6–6.4) | 30 | 12 | 40.0% (22.7–59.4) | 14.3% (3.0–36.3) |
Total | 1155 | 148 | 12.8% (10.9–14.9) | 393 | 242 | 61.6% (56.6–66.4) | 38.4% (32.2–44.8) |