The study of a general blood test determining the nature of anemic syndrome in young children (0-12 years old) and children (3-6 years old) with infectious processes in the infectious department of the Penza Regional Children's Hospital was carried out. In the study, 4 groups were identified according to blood parameters in the age group 0-12 years. The study of the indicators of the general blood test showed that the first group cannot be attributed to the manifestations of severe anemia

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... me. In the second – normochromic, normocytic anemia syndrome. The third group had a manifestation of anemic normochromic, normocytic syndrome. In children in the fourth group, microcytosis of erythrocytes, anisocytosis, poikilocytosis and hypochromia were detected in blood smears. The data of the general blood test indicated the presence of concomitant anemia microcytic, hypochromic syndrome in children. And in children in the age group of 3-6 years, only in 25.8% of cases, the manifestation of anemic syndrome was found in the test's of 1010 children. In children, the revealed anemic syndrome corresponded to the normochromic, normocytic process. Based on the data obtained, it can be concluded that young children (0-12 years old) and aged 3-6 years who are being treated for the underlying disease have concomitant anemia syndromes in most cases of normochromic, normocytic and in a minority of cases of hypochromic, microcytic nature.