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Percentage of AIV blocked by masks as compared with one layer of cloth
| C t increase ( ± SD) | Percentage blocked (95% CI) | |
|---|---|---|
| N95 mask | 12.49 ± 0.33 | 99.98% (99.98%‐99.99%) |
| Medical mask | 5.13 ± 0.98 | 97.14% (94.36%‐98.55%) |
| Homemade mask | 4.37 ± 0.90 | 95.15% (90.97%‐97.39%) |
Abbreviations: AIV, avian influenza virus; CI, confidence interval; SD, standard deviation.
