Plethysmography of C57BL/7 mice infected with WNV.

<p>Sixteen mice were injected s.c. with WNV. Plethysmograph readings were obtained 2 days before viral challenge and from days 1 to 11 after viral challenge. Data were divided between the surviving or moribund mice. The dotted lines are two standard deviations of the mean of readings on days −2, 1, and 2 for all animals.