Table 2.
General characteristics of household contacts in South Korea, from June 25, 2021 to January 22, 2022
| Characteristic | Household contacts | |
|---|---|---|
| Total (%) | Confirmed (%) | |
| Total | 10,382 (100) | 2,877 (100) |
| Sex | ||
| Male | 4,872 (46.9) | 1,299 (45.2) |
| Female | 5,510 (53.1) | 1,578 (54.8) |
| Age (y) | ||
| ≤19 | 2,524 (24.3) | 929 (32.3) |
| 20–29 | 911 (8.8) | 181 (6.3) |
| 30–49 | 3,853 (37.1) | 1,045 (36.3) |
| 50–74 | 2,753 (26.5) | 634 (22.0) |
| ≥75 | 341 (3.3) | 88 (3.1) |
| Vaccination status | ||
| Unvaccinated | 2,942 (28.3) | 1,270 (44.1) |
| 1 Dose | 466 (4.5) | 110 (3.8) |
| Viral-vector | 28 (0.3) | 6 (0.2) |
| mRNA | 438 (4.2) | 104 (3.6) |
| 2 Doses | 5,912 (56.9) | 1,351 (47.0) |
| Viral-vector (≤90 d) | 225 (2.2) | 68 (2.4) |
| Viral-vector (>90 d) | 734 (7.1) | 207 (7.2) |
| mRNA (≤90 d) | 2,961 (28.5) | 606 (21.1) |
| mRNA (>90 d) | 1,679 (16.2) | 395 (13.7) |
| Mixed (≤90 d) | 81 (0.8) | 20 (0.7) |
| Mixed (>90 d) | 232 (2.2) | 55 (1.9) |
| 3 Doses | 1,062 (10.2) | 146 (5.1) |
| 2 Viral+1 mRNA | 555 (5.3) | 80 (2.8) |
| 1 Viral+2 mRNA | 108 (1.0) | 13 (0.5) |
| 3 mRNA (≤90 d) | 399 (3.8) | 53 (1.8) |