Virological analysis of lungs and trachea of ferrets.

<p>Five days after challenge ferrets were sacrificed and virus titers in the lungs and trachea were determined by end point titration. Depicted are log transformed titers in the lungs <b>(A)</b> and trachea <b>(B)</b>. Ferrets that had to be sacrificed or died prior to scheduled section were excluded from the analysis. Data were analyzed by the Mann-Whitney test.*p = <0.05 **p = <0.01 compared to mock vaccinated mice.