Background: Acute lymphoblastic leukemia (ALL) belongs to a heterogeneous, highly aggressive group of hematologic malignancies. In the context of the epidemic of a new coronavirus infection (COVID-19), patients with hemoblastoses have a more severe course of the viral infection and high mortality rate due to COVID-19. The management protocols of patients with ALL in the context of the COVID-19 pandemic has not been developed, and approaches to both the treatment of a new coronavirus infection and the antitumor treatment of ALL in patients with COVID-19 have not been defined. Aims: To analyze in-hospital overall survival of patients with acute lymphoblastic leukemia and coronavirus infection, to assess the impact of poor prognostic factors on the outcome of the disease, and to determine the therapeutic tactics for ALL and COVID-19. Methods: From April 21, 2020 to November 30, 2021 46 patients with ALL (24 men, 22 women) with a median age of 44.5 (18-74) years were observed on the basis of the hematological service of the City Clinical Hospital No. 52 (Moscow). According to the immunophenotypic variant of ALL, 27 (59%) were patients with B-ALL, of which Ph-positive ALL was diagnosed in 8 (30%), Ph-negative - in 19 (70%); T-ALL - 16 (35%), biphenotypic - 2 (4%). Patients with newly diagnosed ALL (20%) underwent induction antitumor therapy, 67% - convalescents and PCR positive for SARS-CoV-2 infection. To determine the factors of hospital mortality, a statistical analysis was performed, including: age, hematological disease status, degree of lung tissue damage according to computer tomography (CT), stay in the intensive care unit due to severe respiratory failure requiring mechanical ventilation (ALV), the presence of neutropenia of the IV degree, transfer from another hospital, the formation of an antiviral immune response after a coronavirus infection. Results: Hospital mortality in ALL patients was 30%. Statistically significant factors for poor prognosis were: age (>40 years), p=0.033, hematological disease status (newly diagnosed ALL, progression/relapse), p=0.004, high (≥50%) degree of lung tissue damage according to CT (p =0.003), neutropenia IV degree (p=0.004), their transfer to another hospital, stay in the intensive care unit and mechanical ventilation (p=0.004). Summary/Conclusion: The main adverse factors affecting hospital mortality were the absence of ALL remission and the presence of severe infectious complications. Carrying out antitumor therapy allows to stabilize the status of ALL and is an important aspect in the simultaneous course of coronavirus infection. In patients with ALL and confirmed coronavirus infection, the decision to conduct induction therapy should be discussed on an individual basis, depending on ALL status, the activity of coronavirus infection and comorbidity status.