Table 1. General characteristics of contacts to COVID-19 cases in Guangdong Province.
| n | % | |
|---|---|---|
| Sex | ||
| Male | 6183 | 53.4 |
| Female | 5397 | 46.6 |
| Age (years) | ||
| 0–9 | 1048 | 9.0 |
| 10–19 | 819 | 7.1 |
| 20–29 | 2420 | 20.9 |
| 30–39 | 2601 | 22.5 |
| 40–49 | 1878 | 16.2 |
| 50–59 | 1520 | 13.1 |
| 60–69 | 831 | 7.2 |
| 70–79 | 314 | 2.7 |
| ≥80 | 149 | 1.3 |
| Places of quarantine | ||
| At home | 1855 | 16.0 |
| Centralized stations | 9725 | 84.0 |
| Contact circumstances | ||
| Family | 4893 | 40.9 |
| Social activities | 2016 | 16.8 |
| Transportation | 3198 | 26.7 |
| Flight | 695 | 5.8 |
| Train | 902 | 7.5 |
| Public transportation* | 229 | 1.9 |
| Private car | 213 | 1.8 |
| The Dream Cruises | 64 | 0.5 |
| Unknown | 1095 | 9.2 |
| Health care institutes | 1348 | 11.3 |
| Others | 519 | 4.3 |
| Relationship with index cases | ||
| Family members | 4707 | 40.7 |
| Spouse | 563 | 4.9 |
| Family members (non-spouse) | 1878 | 16.2 |
| Close relatives | 1341 | 11.6 |
| Other relatives | 925 | 8.0 |
| Social activity contacts | 3344 | 28.9 |
| Transportation contacts | 2778 | 24.0 |
| Health care workers | 573 | 4.9 |
| Others | 178 | 1.5 |
| Infection spectrum of contacts | ||
| No infection | 11065 | 95.6 |
| Asymptomatic infections | 66 | 0.6 |
| Mild confirmed cases | 104 | 0.9 |
| Moderate confirmed cases | 300 | 2.6 |
| Severe confirmed cases | 31 | 0.2 |
| Critically severe confirmed cases | 12 | 0.1 |
| Dead cases | 2 | <0.01 |
*Indicate other public transportations mainly including bus, taxi, subway, ferry, etc.