Table 1. AIV infection rates in hand-reared ducks.
| Year | GBF | Number of samples | Duckling age (weeks) | Days before release | AIV prevalence (%) |
| 2009 | GBF1 | 222 | 6 | 21 | 99 |
| 2010 | GBF1 | 99 | 6 | 2 | 8 |
| GBF2 | 100 | 7 | 0 | 0 | |
| GBF3 | 100 | 12.5 | 0 | 24 | |
| GBF4 | 100 | 8 | 0 | 0 |
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