Figure 2. Gross pathologic lung lesions in H2N2 and H2N3 infected animals.
Gross pathological lung lesions are expressed as the mean percentage of the upper, middle and lower right lung lobe surface covered by lesions (nā=ā2 per group). Error bars represent standard error of the mean. *significantly different from H2N2, P<0.01; 2-way analysis of variance (ANOVA).