CHANGES IN THE CONCENTRATION OF CD33 AND BLAST CELLS IN THE BLOOD OF PATIENTS WITH ACUTE MYELOID LEUKEMIA IN THE FIRST CHEMOTHERARY TREATMENT Free CD33 concentration in plasma and leukocyte count, the number of blast cells in blood of 21 patients with (AML) is determined at the time points: pre-treatment (N1T0) and every three day after treatment (N1T1, N1T2, N1T3, N1T4, N1T5, N1T6 and N1T7).