[The sanitary status of natural waters on the territory of Moscow (according to the results of the examination of chemical and radionuclide composition)].

The paper presents the results of examination of the chemical and radionuclide composition of natural waters and snow cover in Moscow. Areas with abnormal contents of tritium are found in the underground and surface waters and snow cover. The high concentrations of strontium, boron, fluorine, and barium are ascertained to be associated with natural factors.

[The immune response of viral hepatitis patients who use narcotic preparations].

The characteristics of cell-mediated and humoral immunity were studied in 611 patients with different etiological forms of acute virus hepatitides (HB, HC, HB + C, HC + HBsAg). As the result of the systematic abuse of psychoactive preparations, introduced by intravenous injection, in 166 patients (27.2%) drug addiction developed, ehile 445 (72.