Table 3.

The scores of clinical signs after challenge and lung lesions recorded at 28 DPC^a

Groups	Scores of clinical signs (±SD)b	Scores of lung lesions (±SD)c
CH-1R/pIL-4 + Challenged	3.9 ± 0.18B	21.5 ± 3.32B
CH-1R + Challenged	3.4 ± 0.27B	23.6 ± 5.57B
Challenged	5.6 ± 1.58A	51.2 ± 8.33A
Mock	3 ± 0.00B	6.67 ± 0.58C

^aWithin each column, the different letters (A, B, C) represent the values significantly different (p < 0.05)

^bScores of clinical sign were expressed as the sum of daily observations of all clinical signs

^cPercentage of the entire lung affected by pneumonia