Treatment | Southern Germany [1] | Northern Germany [28] | United Kingdom [29] | France [30] | Merged data |
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Placebo animals (%) | 14 a | 9 | 15 a | 6 | 11 a |
Vaccinated animals (%) | 10 b | 7 | 5 b | 5 | 7 b |
- a,b Different letters in the same column indicate significant differences (p < 0.05). Merged data refers to the grouping of animals of all the farms studied