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 gilts
No. of fetuses
Litter size (mean)
Normal (%)
Autolyzed (%)
Mummified (%)
Phase I
1-NC
8
110
13.8
20.0
4.5
75.5
2-Vac
10
178
17.8
97.2
0.0
2.8
Phase II
4-NC
86
10.8
7.0
8.1
84.9
5-Vac
6
72
12.0
1.4