3. Phagocytic activity (granulocytes, monocytes), nitroblue tetrazolium test; activated T-lymphocytes (CD3+CD69+); activated B-lymphocytes (CD3-CD69+); absolute content of leukocytes; absolute and relative content of lymphocytes, granulocytes, monocytes, T-lymphocytes (CD3+, CD4+, CD8+), B-lymphocytes (CD69+); natural killers (CD3-, CD16+, CD56+), activated T-cells (CD3+ HLA DR).