Table 1.
Summary of epidemiologic characteristics of 2019 novel coronavirus disease using early 28 cases in Korea
| Characteristics | n (%) |
|---|---|
| Male | 15 (53.6) |
| Age (yr) | |
| 20-29 | 6 (21.4) |
| 30-39 | 6 (21.4) |
| 40-49 | 6 (21.4) |
| 50-59 | 8 (28.6) |
| 60-69 | 1 (3.6) |
| 70-79 | 1 (3.6) |
| Nationality | |
| Korean living in Korea | 22 (78.6) |
| Chinese living in Korea | 3 (10.7) |
| Chinese travelers from Wuhan, China | 3 (10.7) |
| Source of infection | |
| Index case (n=16) | |
| Wuhan, China | 11 (68.8) |
| Guangdong, China | 1 (6.3) |
| Singapore | 2 (12.5) |
| Japan | 1 (6.3) |
| Thailand | 1 (6.3) |
| 1st generation (n=9) | |
| #16 | 2 (22.2) |
| #3 | 2 (22.2) |
| #5 | 2 (22.2) |
| #15 | 1 (11.1) |
| #12 | 1 (11.1) |
| #15 | 1 (11.1) |
| 2nd generation (n=3) | |
| #6 | 3 (100) |
| Period category (d) | Average (range)/median |
| Incubation period1 | 3.9 (0-15)/3.0 |
| Serial interval | 6.6 (3-15)/4.0 |
| Symptom-onset to diagnosis1 | 5.2 (0-16)/4.0 |
| Symptom-onset to quarantine or isolation1 | 4.3 (0-15)/3.0 |
| Diagnosis to discharge2 | 13.0 (7-17)/12.5 |
| Reproduction number | Estimate (Poisson 95% CI)/[binominal 95% CI] |
| Total | 0.48 (0.25, 0.84)/[0.28, 0.69] |
| 1st generation (n=9) | 0.56 (0.26, 1.07)/[0.30, 0.80] |
| 2nd generation (n=3) | 0.33 (0.07, 0.97)/[0.07, 0.70] |
CI; confidence interval.
1
Three asymptomatic cases were excluded.
2
First 8 discharge cases were included.