the mean blocking antibody factor in the immune serum of the cra-it group showed a 2.5 x 10 ( 2 ) -fold increase [ 1.3 +/- 0.3 x 10 ( -1 ) in postimmune serum/5.2 +/- 2.0 +/- 10 ( -4 ) in preimmune serum ( p less than 0.001 ) ] .
C0003241
antibody
C0020960
immune serum