From: Duration of immunity against heterologous porcine parvovirus 1 challenge in gilts immunized with a novel subunit vaccine based on the viral protein 2
Group
No. of animals included
No. of animals evaluated for efficacy
Phase I
1-NC
12
8
2-Vac
11
10
3-SCa
4
–
Phase II
4-NC
5-Vac
7
6
6-SC