Table 1. Cross-neutralization ability of FNAV against venoms from N. kaouthia, N. siamensis and O. hannah.

Venom	Lethality		FNAV
	LD50a (μg/g)	MLDb (μg/g)	ED50 (μL/mouse)	ER50 (mg/ml)	Potencyc (mg/ml)
Naja kaouthia	0.34 (0.22–0.39)	0.471 ± 0.02	4.02 (1.27–5.43)	2.19 (1.16–6.91)	0.49
Naja siamensis	0.56 (0.35–0.62)	0.756 ± 0.05	18.33 (0.59–1.04)	0.85 (0.65–1.43)	0.23
Ophiophagus hannah	0.98 (0.75–1.08)	1.325 ± 0.08	NEd	NE	NE

^a LD₅₀: Median Lethal Dose—the dose of venom that induces lethality in 50% of subcutaneously injected mice (20–25 g). The values in parentheses are 95% confidence limits.

^b MLD: Minimum Lethal Dose—the lowest dose of venom that induces lethality in 100% of subcutaneously injected mice.

^c Potency: defined as the amount of venom in milligram was completely neutralized (100% protection) per milliliter of antivenom.

^d NE: Display ineffective.