From: Vaccination of sows against type 2 Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) before artificial insemination protects against type 2 PRRSV challenge but does not protect against type 1 PRRSV challenge in late gestation
Group ( n)a
Vaccination
Challenge
Type 1 PRRSV
Type 2 PRRSV
1 (5)
O
X
2 (5)
3 (5)
4 (5)
5 (3)
6 (3)