From: A competitive ELISA based on nanobodies for the detection of serum neutralizing antibodies against porcine epidemic diarrhea virus
Serum neutralization test
Number
cELISA
Agreement (%)
Kappa value
 + 
-
79
0
96.34
0.883
1:4
11
6
5
1:8
30
29
1
1:16
24
1:32
20