Chemical Inactivant X– potency (ED50) X– ED50
Ascorbic acid 0.0026
0.0022
0.0024
Beta-propiolactone 0.007
0.005
0.006
Formalin 0.01
0.012
0.011
Table 1: Determination of inactivated Rift Valley Fever virus vaccine Potency (ED50).