The regularities of the personality traits influence on the immunity B
-system reactions in different psychoemotional states were investigate
d. It was established, that the immunity B-system state didn't signifi
cantly depend on the personality peculiarities in the conditions of th
e psychological comfort. The personality's traits influence on the imm
une reactions when the individual is in stress condition is carried ou
t by means of the functional reserve of B-lymphocytes decreasing in th
e situations of the psychoemotional influences.