Table II.
Exposure to person(s) with symptoms of an acute respiratory illness in the previous 7 days by source(s), healthcare personnel, Canada, 2010/11–2013/14
| Source(s) of exposurea | Cases (N=814) |
All controls (N=9005) |
Matched controls (N=3244) |
|---|---|---|---|
| No exposures reported | 298 (36.6) | 5873 (65.2) | 2082 (64.2) |
| One source | N=374 | N=2438 | N=932 |
| Household | 166 (20.4) | 441 (4.9) | 173 (5.3) |
| Patient | 73 (9.0) | 1344 (14.9) | 523 (16.1) |
| Social contact | 73 (9.0) | 312 (3.5) | 107 (3.3) |
| Co-worker | 62 (7.6) | 341 (3.8) | 129 (4.0) |
| Multiple sources | N=142 | N=694 | N=230 |
| Household and co-worker | 12 (1.5) | 29 (0.3) | 9 (0.3) |
| Household and social | 24 (2.9) | 109 (1.2) | 42 (1.3) |
| Household and patient | 31 (3.8) | 122 (1.3) | 31 (1.0) |
| Co-worker and social | 15 (1.8) | 51 (0.6) | 16 (0.5) |
| Co-worker and patient | 18 (2.2) | 117 (1.3) | 42 (1.3) |
| Social and patient | 21 (2.6) | 172 (1.9) | 52 (1.6) |
| Household, co-worker and social | 5 (0.6) | 4 (0.04) | 3 (0.1) |
| Household, co-worker and patient | 5 (0.6) | 14 (0.2) | 6 (0.2) |
| Household, social and patient | 6 (0.7) | 27 (0.3) | 10 (0.3) |
| Co-worker, social and patient | 5 (0.6) | 44 (0.5) | 16 (0.5) |
| Household, co-worker, social and patient | 0 | 5 (0.01) | 3 (0.1) |
a
Source of exposure may include more than one person (e.g. exposure to a household may include exposure to more than one ill person in that household).