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Comparison of positive rates of subjects with different close contact statuses.
| Contact status | Positive rate | N = 1976 | p value | |
|---|---|---|---|---|
| LH group | Control group | |||
| Close contact | N | 31 | 35 | 0.6762 |
| Positive, N (%) | 2 (6.45) | 4 (11.43) | ||
|
| ||||
| Secondary close contact | N | 1070 | 840 | 0.0485 |
| Positive, N (%) | 1 (0.09) | 6 (0.71) | ||
