Clinical and immunological investigations were conducted in 70 patients with arterial hypertension from among those individuals having taken part in the elimination of the aftereffects of the Chernobyl APP breakdown in 1986-1987. The analysis of the results obtained showed the patients with primary and renal hypertension present with pathogenetic heterogeneity of the immune disturbances, which fact necessitates conducting rigorous immunologic monitoring for the methods of immune correction to be objectivized.