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Overview of the number of vaccinated and control piglets born from PRRSv-vaccinated ELISA-seropositive sows (E+ piglets) and PRRSv-vaccinated ELISA-seronegative sows (E− piglets) in two Belgian farrow-to-finish herds.
| E+ Piglets | E− Piglets | |||
|---|---|---|---|---|
| Vaccinated | Control | Vaccinated | Control | |
| Herd 1 | 20 | 9 | 36 | 18 |
| Herd 2 | 39 | 20 | 20 | 11 |
