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Information of clinical samples
| No. of farms | ||
|---|---|---|
| Tissues | Sera | |
| 2016 | 157 (50.3) | 361 (24.4) |
| 2017 | 178 (69.5) | – |
| 2018 | 166 (52.4) | – |
| Total | 501 (57.5) | 361 (24.4) |
Parentheses is the PCV2-positive ratio (%). Multiple clinical samples collected from single farm were counted as one
