Comparison of H5N1 and H7N9 avian influenza cases in human [24,34]
| H5N1 | H7N9 | |
|---|---|---|
| Key factor of spread | Wild bird migration, poultry trade route | Live bird market |
| Median age | 18-26 years | 62 years |
| Case fatality rate | 50%-60% | 30%-40% |
| Male (%) | 51% | 71% |
| Incubation period | 4 (2-8) | 6 (1-10) |
| Estimated R0 | 0.06-1.14 | 0.10-0.47 |
| Exposure to poultry | 58%-84% | 56%-75% |
| Human tropism mutation | N/A | T160A, Q226L, E627K |
| Exposure level | High-level (slaughtering of sick/dead birds) | Low-level (walk through LBM) |
| Median time from admission to death | 5.7 days | 12.0 days |
| Fever ≥38℃ | 65% | 79% |
| Cough | 54% | 71% |
| Sore throat | 5% | 9% |
| Shortness of breath | 8% | 13% |
Korean J healthc assoc Infect Control Prev 2024;29:82~92 https://doi.org/10.14192/kjicp.2024.29.2.82
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