| |
|
Incidence of infection |
| Duration of contact (hours) |
No. tested |
Infected (%) |
| |
-7.9 |
106 |
15(14.2) |
| 8-49 |
161 |
16(9.9) |
| |
50-99 |
98 |
10(10.2) |
| |
100- |
215 |
43(20.0) |
| Total |
|
580 |
84(14.5) |
| P of trend of linear trend of proportion ＜0.05, Unknown duration of contact; 33 cases |
|
