Table 2. Viremia levels in fish crows that survived or died after challenge with virulent West Nile virus.

Treatmenta	Survived (peak)		Died
	No.	Viremiab	No.	Peak viremiab
IM	9	2.9 (0.4)	0	n/a
Oral	4	3.6 (0.7)	4	6.9 (1.0)
Placebo	5	3.8 (0.4)	5	4.8 (0.4)

          ^aIM, intramuscularly. Crows were inoculated IM with 0.5 mg of the DNA vaccine. Oral, crows were given 0.5 mg of the DNA vaccine orally. Placebo, crows were inoculated IM with 0.5 mg of nonspecific DNA and given 0.5 mg of nonspecific DNA orally.
          ^bLogarithm mean peak viremia in crows bled every third day after challenge (S.E.). A value
          of 1.7 was assigned to birds from which no virus was detected for calculation of mean and S.E.