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Absolute risk of laboratory-confirmed influenza infection in healthcare workers by the type of mask worn
| Study | Included Patients (n) | Randomization | Incidence of laboratory-confirmed influenza infection | |
|---|---|---|---|---|
| Mask | Respirator | |||
| Loeb, 2009 [52] | 446 | Individual | 22.2% | 21.7% |
| MacIntyre, 2011 [53] | 1441 | Cluster | 1.2% | 0.4% |
| MacIntyre, 2013 [43] | 1669 | Cluster | 0.3% | 0.5% |
| Radanovich, 2019 [54] | 2862 | Cluster | 7.3% | 8.3% |
Adapted from Bartasko et al. [45]
