Table 3. SARS-CoV-2 Infection among Quarantined Persons According to Exposure Type and Presence of Symptoms.*.
| Variable | No. of Persons | qPCR | Both Pan-Ig Antibody Assays | ||||
|---|---|---|---|---|---|---|---|
| No. Tested | No. Positive (%) | OR (95% CI)† | No. Tested | No. Positive (%) | OR (95% CI)† | ||
| No household exposure | 18,877 | 6839 | 689 (10.1) | 3700 | 52 (1.4) | ||
| Household exposure | 1,889 | 1092 | 399 (36.5) | 5.2 (4.5–6.1) | 503 | 37 (7.4) | 5.2 (3.3–8.0) |
| No reported symptoms | 3,439 | 1421 | 142 (10.0) | 1007 | 24 (2.4) | ||
| Reported symptoms | 1,639 | 1397 | 920 (65.9) | 18.2 (14.8–22.4) | 237 | 17 (7.2) | 3.2 (1.7–6.2) |
*
Exposure data were available for 7931 persons who had been tested with qPCR and 4203 tested for antibodies. Symptom data were available for 2818 persons who had been tested with qPCR and 1244 tested for antibodies. The effects of household exposure and symptoms were tested separately among all persons who were tested by qPCR and the collected subset of non qPCR-positive persons tested for antibodies.
†
The odds ratios (ORs) comparing exposed with nonexposed and symptomatic with nonsymptomatic were adjusted for sex, age, and age squared.