Figure 1From: Cross reactive cellular immune responses in chickens previously exposed to low pathogenic avian influenzaEffect of A/chicken/NJ/97 (H9N2) infection on weight gain in MHC-defined (B2/B2) chickens at 2, 4 and 7 days post infection. Two-week old birds received either PBS (Sham) or 107 EID50 H9N2 per bird via intranasal route. Bird weight was significantly reduced between the two groups on each day tested (p<0.05).Back to article page