Introduction: Coronavirus SARS-CoV-2 represents the new virus type that quickly extended to the whole world, causing the epidemic disease, called Covid-19. (Liu J. Et al., 2020). The appearance of Covid-19 created hard tasks for all specialists in the sphere of healthcare. The mentioned tasks are connected with fast diagnostics and clinical care of patients, which were confirmed to be ill on Covid-19. Many problems of epidemiology, diagnostics, clinics and curing of this infection stay to be contradictory and poorly investigated. (Nikiforov V.V., 2020; Zadorogna V.I., 2020). 

Aim: The main aim of our research is to investigate hematological, biochemical and immunological indicators, it’s peculiarities and age, sex, concomitant pathologies correlations.

Materials and methods: The analysis of the medical histories of sick on Covid19 patients was conducted, which had been cured in the Volyn regional infectious hospital during 2020–2021 years. In general 2592 people were cured. The statistical part of male patients is – 1005, of female patients – 1493, of children – 94. There were 52 girls and 42 boys among these children. Another important step of this research was the processing of on Covid-19 sick people groups, which were divided by us into 3 groups according to the following criteria: patients without concomitant pathology, patients with some concomitant pathology and patients with fatal cases. The control group, which consisted of 33 persons, was represented by patients with pneumonia but without Covid-19. Analysis of this research results can testify that the dominating majority of patients are people of old age. The fatal cases fold 4,2% and 95,8% of patients recovered. Women appeared to fall ill with Covid-19 more often than men. The group of examined patients is structured depending on the type of concomitant pathology. 

Results: In the process of this research the structural characteristics of patients with Covid-19 was defined. Another point is the establishment of peculiarities of hematological and biochemical pointers among the patients with Covid-19 due to different age groups, depending on concomitant pathology. The got results allow us to improve the diagnostic’s effectiveness and to work out the criteria of disease-flowing prognostication.

Conclusions: Finally, generalizing the above-mentioned information, the following conclusion can be made, that the largest part of with Covid-19 ill patients constitute men and women of age till 60 years, besides the smallest part represent patients, whose age is above 70. Frequencies of lethal cases, caused by Covid-19, prevail among the male humans, regardless of age.