Table 1.

Vaccinia virus strain specific mouse LD₅₀

Virus	Dose (pfu or ffu)	Mortality*	LD50 (pfu or ffu)
MVA	100	0/12	≥ 100,000
	101	0/12
	102	0/12
	103	0/12
	104	0/12
	105	0/21
Dryvax®	100	0/22	44.7
	101	11/36
	102	26/39
	103	9/12
	104	10/10
	105	12/12
Lister	100	5/32	11.2
	101	16/34
	102	27/32
	103	12/12
	104	10/10
Copenhagen	100	6/32	6.6
	101	18/33
	102	31/33
	103	10/10
	104	12/12
WR	100	11/29	1.5
	101	25/25
	102	20/20
	103	12/12
IHD-J	100	21/34	1.0
	101	20/20
	102	34/34
	103	12/12
Medium	-	0/20	-

^*For humane purposes, moribund mice were euthanized and included in mortality counts.