Table 3. Level and duration of viremia in hamsters previously immunized with WNV killed virus vaccine (Fort Dodge) and challenged with the NY385-99 strain of WNV^a.

Animal no.	Postinfection, by day
	1	2	3	4	5	6
8440	0b	0	0	0	0	0
8441	0	1.2	3.5	1.3	1.2	0
8442	0	0	0	0	0	0
8443	0	0	0	0	0	0
9445	0	0	0	0	0	0
8446	0	0	0	0	0	0
8447	0	0	0	0	0	0
8448	0	0.7	3.0	4.3	2.3	0
8449	0	0	0	0	0	0

^aWNV, West Nile virus.
^bVirus titers in blood expressed as log₁₀ 50% tissue culture infective dose₅₀/mL of blood. 0 = <10^0.7 TCID₅₀.