passages.id: split_8_test_171_passage
passages.type: progene_text
passages.text: In the 2 - day trial , the immediate increase in R1 , after antigen challenge was only partially blocked ( EAR = 163 +/- 16 % , P < 0.10 vs. placebo and P < 0.05 vs. 4 - day trial ) , but the late response was completely blocked ( 24 +/- 3 % ) .